how to destring a variable in stata toc file). 7 3 An alternative to using the destring command is to use generate with the real() function; see[D] functions. The command may be applied to a single variable or to a list of multiple variables. Step 4: Destring the data The data is now in a panel format, where each row contains a unique institution and year. google. ) because of the option force (this can be dangerous if the content of a cell is a combination of a numerical value and text). Now the data is in order, so we can drop the first row and destring the variables: drop in 1 // drop the first row destring _all, replace If everything is done correctly, this should give us a Where variable 1 is the question asked in 2010, and variable 2 is the same question asked in 2020. Please note that a macro in Stata is not the same as a macro in Microsoft Excel. Any variable labels or characteristics will be copied to the new variables created. ). The destring command might be the first choice for converting string variables to numeric if we have a limited number of non-numeric characters. z and underscore “. If we start with a variable x, and generate a variable x*, the process is: x* = (x-m)/sd. wisc. icd9 clean dx_dot, dots. icd9 clean dx_dot, dots. Hello, I am using a logit model where the dependent variable is risk of infection (high/low) and independent variables are gender, age, income, and pathogen load. Strings can be converted into numeric in two ways. " You can then use that number in a variety of ways. Any variable labels or characteristics will be retained. mwn. Use this command carefully! If you have any variables where “999” is a legitimate value, Stata is going to recode it to missing. - prefix. com To see this, create two new variables called num_dx and num_dot. Commands are written in lower-case. Task 1: Getting the data in order Any non numeric character -- even in one observation, such as n/a for one observation, will cause Stata to read the variable as a string. Destring is very useful, but you need to be careful. That is, the values of any given row in the original data will end up in a column, and vice versa. Statalist. Stata interprets GDP and gdp as two different variables that can co-exist in the same file. See full list on ssc. Let’s say we want to rename variables mtemp1-mtemp12 as mtempjan-mtenpdec. edu . This tells you that there is a non-numeric character in a variable that you expect to be all numeric, but it does not tell you what the of the first variable, and this 133 times, and stores this in my variable. Thank you! 1 Comment. Note: Missing variables are stored as ". Strings can be converted into numeric in two ways. This video explains how to change data type of variables from string to numeric by three different methods, using #Stata. In order to replace “make”, we will use the command: destring make, replace Terminology: "columns" in Stata are always called variables. do file keyboard buttons + Data Processing with Stata 14. Please take a look at the do ﬁle attached. ) is the same in two related groups (e. 0. e. The force option tells Stata to convert anything that doesn’t look like a number to missing value. This article will introduce Stata's user interface and teach you its basic syntax. gov) • Laura Hughes (

[email protected] If string make sure the categories have the same spelling (i. That will give you a list of values that Stata did not destring and you can make the changes to the new variable as needed. Variable and file names can be in upper and/or lower case, but consistency is necessary. Multiple regression (an extension of simple linear regression) is used to predict the value of a dependent variable (also known as an outcome variable) based on the value of two or more independent variables (also known as predictor variables). ) Thus, we need to write as many Dictionary files as the number of Levels. . It's type is str14! All observations are numbers. g. a value of 1. The dpcomma option was added to the destring command on 15 October 2007 and It might not make sense to define a string with a variable and try to convert it to the variable itself but it will be helpful in my code. regress, use, display. To get the mean of two variables, you can just divide their sum by 2: gen var = (var1 + var2)/2. charlist may, for example, reveal the presence of problematic “Migrating to Stata Painlessly!” is a reduced version of our “Up and Running in Stata” course. Some systematic treatment of your string variables is called for, perhaps applying encode or destring (see [D] encode or [D] destring) or perhaps moving them to one end of the dataset with order (see [D] order). The command would look as follows: merge 1:m company ” c:\ … \filname. clonevar dx_dot = dx. With encode, you need to specify the , generate() option and give it a new variable name. This command generates a new variable named ‘rep2’ which takes on the value of 1 only for observations where rep78 is equal to 2. destring id, replace Converts the variable id into numeric variable Variables: A list of all variables in your dataset Properties: Review variable names, labels, value labels, notes, formats, storage types Interacting with Stata: traditionally a command-line driven language Pull-down menus Type commands in the command window Type a list of commands in a do- le and execute the do- le Introduction to Stata 4/12 Sometimes copying and pasting all or part of the displayed output to the command window may be the most practical way to use the output, say as argument to destring, ignore(). Therefore, I use the command of “destring” to make this variable numeric. Downloadable! catenate generates a new string variable by concatenating varlist. Remember the function mdy for month, day and year. Clyde Schechter and I have a paper coming out in Stata Journal 18(4) about vexatious string variables. The data contains a ID, date of treatment, and treatment code, for example (all made up data): ID Date Treatment 1 1Jan1990 D 1 1Feb1991 D 1 1Mar1992 T 1 1Feb1993 F 1 1Mar1994 D 2 1Apr1990 D 2 1Feb1992 D 2 1Feb1995 D Note: Missing variables are stored as ". Thank you, Martin and Nick for your help. Some very basic commands for STATA Set more off (turns off the requirement to press the enter key) To read in your excel file: insheet using "F:\file name. clonevar dx_dot = dx. This will generate the output. xtile - Creates a ntile classification variable, similar to Stata's xtile command destring - Converts a string vector to a numeric vector rowstat - Creates a vector of statistics from multiple rows in a dataframe, analogous to Stata's egen row commands Converting string to numeric variables is easy with -destring- (-help destring-). A list of variables consists of the names of the variables, separated with spaces. Variable types: string, byte ,int ,long , float & double Numerical Variable Numbers are stored as byte, int, long, float, or double with the default being float. Stata. For example, in the following dataset income is stored as a string: ‘‘‘ webuse destring1, clear destring income, replace ‘‘‘ Hi Statalist, I am facing a problem with destring a variable! My variable named "Dealvalue" has 72914 observations. It is always a good idea to browse and describe the dataset before you delve into it. string c1 to c4 (a7). The default data storage type for Stata is “float. If varlist is not speciﬁed, destring attempts to convert all variables from string to numeric. ACCOUNTING. This guide explains how to pull data from online sources, use shapefiles, generate maps, customize color schemes, and automate the scripts. Min Max newx 10 1. i. Replace the string variable. Explore each dataset separately before In Stata a similar thing can be done using a combination of substr() and strlen(). You should only use **destring** if a variable actually contains numeric values. It is designed to be an overview rather than command destring. edu) . 8071899 . With this command, we can either generate a new variable or replace the existing one. How to write a simple macro in Stata. To recode variables in Stata, use the recode command. a-. Specifically: “variable” - In Stata this refers only to columns in the active data set. , there was a linear relationship between your two variables), #4 (i. ) because of the option force (this can be dangerous if the content of a cell is a combination of a numerical value and text). 3. Split numeric variable stata. dta. In this case, let's assume that within each case the integer variable either increases or remains the same each year, but never decreases and I want to verify this using the assert command. Stata: characteristics portfolios from Ken French data library - BM_breakpoints. [variable]- indicates a continuous variable. Step 5A (iV): Save this le with a new name such asFILE2 V2. Just type in help destring and follow the examples in the documentation. Recoding a variable To recode a variable: First make a copy of the variable: generate race2 Multiple Regression Analysis using Stata Introduction. Use help date function and find it if necessary. how can i download this commant, please help anyway, i am running the fixed model for data panel, and trying to use collin to know the vif, what should be the value for vif suitable for checking collin ? command, Stata creates the new variable and adds it to the data set. Once the data are declared to be time-series, Stata prints out important information about your time-series. Most commands in Stata allow (1) a list of variables, (2) an if-statement, and (3) options. The second line will assign the variable the Stata daily date format, which means that when you look at that variable in the data, it will be shown in human readable form. Since Stata allows you to do analyses only on numeric variables you will need from DATA 214 at Stanford University 2. g. csv" To replace nonnumeric data: destring variable name, replace force To generate a new variable, e. 10984025984167. Read in such variables as string, and then within Stata use destring, replace dpcomma. ) A few more useful panel data commands to look up: • The by: construction. e. In the example below the time variable is stored in “date” but it is a string variable not a date variable. org would work with your variables. I want 1-10 to show the responses people gave (The question was the same in both years: how happy are you with X on a scale from 1-5). First, however, see [D] destring to learn about its options for special problems, and, We could have copied the English ones by using the option Stata String Variable To Numeric Loading Notes change: Percent decline in the crude birth rate (CBR) -the words. summarize x Variable Obs Mean Std. com, author = {}, title = {Title stata. Take the temperature dataset we created as an example. Transposing a matrix means to interchange rows and columns. Transpose data. The Stata command "destring" and "encode" could be used to convert string variables to numeric variables. e. A quick browse at the data indicates the presence of hyphens (“-“) and that these were used in different ways: one to indicate a negative number and another to indicate a missing observation. However, I don't know how to write the except part. The paired t-test, also referred to as the paired-samples t-test or dependent t-test, is used to determine whether the mean of a dependent variable (e. com destring — Convert string variables to numeric variables and vice versa Description Quick start Menu Syntax Options for destring Options for tostring Remarks and examples Acknowledgment References Also see Description destring converts variables in varlist from string to numeric. As an alternative, you could list var names separately rather than using _all. Some of them are missing, some have the value -1 and the rest of them are usually a very big number like 3,834,848. EGEN command, variable TYPES • Can be very useful to transfer information from one obs (i. com destring is designed for situations in which you have a string variable, typically containing meaningful numeric text (e. Missing values in Stata are stored as ". Hi Statalist, I am facing a problem with destring a variable! My variable named "Dealvalue" has 72914 observations. Fixed Effects and Random Effects Models in Statahttps://sites. 2 Variable Types Variables can contain numbers or strings. Type help merge for details. The variables in varlist may be string or numeric. g. These commands rely on value labels, which are described below. ): generate variablename=_n. changed the name of all variables that start with "male" by replacing "male" with "m" only. . The second, and more likely, scenario is that the optimizer wound up in a bad concave part where the computed gradient and Hessian give a bad direction for stepping. It is the same with variable ses. generate urbdum= (urb>50) produces the variable as when urb>50 is true Stata produces a value or 1 (for true) and 0 otherwise (=false). We can do so by just tweaking a bit of the codes in the previous example. smcl les needs to be opened in the viewer-window. Reading and Using STATA Output. Alternatively, we can make variables and then erase them manually. Make use of Stata’sdestring command: destring[varlist] , {generate(newvarlist)|replace} [destring_options] Eg: destring Age, replace ignore(NA) So you replace the original string data with the destringed data and are ignoring any variable that has a NA that I added to indicate the name of each variable, • The purpose of data construction is to make a change or changes to this Excel table, for example, - You can change the value of a variable for some or all observations - You can change the name or attribute of a variable - You can add new variables, new observations, or both. This article is part of the Stata for Students series. The new variable is the age of particular firms. So, now party variable is coded either 1 or 0, but it is still string. Step 5A (ii): Destring the variable that identi es the FIPS code in this data set. goo The Stata command "destring" and "encode" could be used to I am trying to destring all variables except one ("ID"). Note that while using list, and some other data display commands, produces values that look like string dates, the actual values stored by Stata are numeric. [variable]- indicates that the variable is categorical, and -c. Stata. Springfield Economania 268 views. Secondly, the syntax also suggests that options cannot be used with this command. …For Stata, a string is any data character…that is not a number…or missing value denoted by the full stop. Keywords: pr0006, binary variables, categorical variables, Data Editor, dates, de-code, destring, encode, identiﬁers, missing values, numeric variables, spreadsheets, string functions, string variables, tostring, value labels 1Thegreat divide Stata datasets are composed of variables, and those variables may take one or more diﬀerent types. Therefore, Stata offers tools to turn these date strings into values that, while still displaying sensical data to humans, are encoded in a numeric format that Stata likes. st: RE: how to split numeric variable, Since you really are not using the state variable as a numeric, convert it to a string. ) is the same in two related groups (e. Syntax step1: tempvar var1 (declaring variable name) Step2: commands referring to `var1 Most commands in Stata allow (1) a list of variables, (2) an if-statement, and (3) options. I then tried destring, ignore(:) but was unable to then make a double and/or format %tc. . To illustrate the process of standardization, we will use the High School and Beyond dataset (hsb2). 3) is not a Stata download site (has no stata. Some of them are missing, some have the value -1 and the rest of them are usually a very big number like 3,834,848. For example, an identifying variable that has values like “022112” as a string, will be converted to 22112 after destring. Let’s use the auto data for our examples. line in your file) to others • Example: try to find the id of the partner of the person with cvid==1, and put it in that person’s line destring person2,g(numperson) /* Make person2 numerical */ See [U] 24. The variables that follow after the word varlist (D201_education_serv, D202_basic_health_serv, D203_transportation D204_security_pub_safe D205_H20_sani_elec, D206_roads D207_employment D208_housing D209_cult_sport_leis, D210_basic_hum_relief, and D211_concern_and_priorit) are de-stringed using the “encode” command and a new variable is Stata is case sensitive. Usually, that variable is now string because of some mistake. e. The first variable is a case id, the second is year, and the third is a variable with integer values. I have a string variable in Stata called YEAR with format "aaaa" (e. destring yr2009, replace force; Let's make sure we deleted those stray rows at the bottom that aren't really data. When I tried, it said type mismatch I have tried the real and the encode commands, none of which are working. Which variables look like dates, but are currently string variables? Change these to Stata date format. In Stata you need to convert this string variable to a date variable. We illustrate another feature of Stata’s syntax using the destring command as an example. do file keyboard buttons + Data Processing with Stata 15 Cheat Sheet For more info see Stata’s reference manual (stata. The variable does not contain nonnumeric characters. The YMD is called a mask, and it tells Stata the order in which the parts of the date are specified. I looked through each pairing in the Stata dataset and then made an Excel spreadsheet that clearly shows the matches. e. The general form of the command is. sex tells Stata that you want it to include a dummy variable 282 Speaking Stata: Finding variables or making them impossible. Ignored because string variable Stata [PDF] destring, replace string variables in varlist with numeric variables with ignore(), be treated as indicating missing numeric values. The ﬁrst need is to Recode an existing variable in Stata. McGovern Harvard Center for Population and Development Studies Geary Institute and School of Economics, University College Dublin August 2012 Abstract This document provides an introduction to the use of Stata. Select ‘Dates and times’ from first box and then double click on ‘date()’ from second box. Prior to that, some other commands such as the following were available: renpfix male m. Frequently you will need to reassign values, rename variables, and give labels that make sense to you. Change missing values coded as 9 to . - [Instructor] In this session,…we're going to explore string variables,…and learn how can use Stata…to manipulate string information. Basic introduction to the analysis of complex survey data in Stata® - Duration: 6:45. If the problem is that you have some observations with non numeric values, like n/a, you should use "destring gdp, replace force. tostring make_num, gen (make_str) converts the numeric variable make_num previously encode d from make back to a string variable but with values in numbers rather than alphabetical letters. do file If a variable has been read as a string but really contains numbers you will want to use the command destring or the function real (). e. tostring Convert a numeric variable to text (string) tostring id, replace Converts the variable id into string variable destring Convert a text (string) variable to numeric. Then create a loop to drop each variable if has a missing value for the min/max. *For each variable, flag conversion failures: cases where converted value is system missing but original value is not empty. Note added 2004: this package was written for Stata 5 and is now superseded by egen, concat() in up-to-date Statas. ” in STATA •To count the number of missing values in all variables in dataset, use user-written command tabmiss –To install, type findittabmissin command window –To use, type tabmiss •Important Note: you can use “findit” to install other user written commands, as well as help files for commands In Stata this process is known as a macro. All rights reserved. . A basic knowledge of Stata is assumed including a familiarity with the Stata interface, scripts, and dofiles. Tab autocompletes variable name after typing part AT COMMAND PROMPT Ctrl 9 open a new . destring dx, generate(num_dx) Now, create a version of dx that includes the dot, and then destring that variable. Stata also lets you take advantage of built-in functions for variable transformations. destring var1, generate (var1_destrung) force tab var1 if var1_destrung ==. How should I do it? I am using Stata/SE 15. When I add the variable to the dataset, STATA recognizes it as a string variable. userweb. Variable names are always unique (Stata won't allow you to create two variables with the same name) but they often have multiple parts. In this Stata guide, learn to generate the following figure where gender information is replaced with easy-to-interpret symbols: The aim of this guide is to expand the use of symbols using dingbats… In a Stata training, one of the students wondered why after importing an Excel file of financial indicators into Stata some were read as strings. We saw how to work with the Data Editor in [GSW] 6 Using the Data Editor—this chapter shows how we would do this from the Command window. When I try to destring the variable with: destring Age, replace. For a variable (for example, q1) that contains integers ranging from 1 to 7, to collapse the values into three categories, use: Wow this is great and very helpful to me as I am new in using Stata, what could be the expression if I wanted the last 2 characters of my variable. Strings are alphanumeric fast_destring: faster alternative to destring. In this data set, some of the variable names are in the form source_variable, like us2000c_sex and us2000c_age. In Stata the commands are: Variable list in STATA. Star3ng)aLog)File) • Thisshouldbeyour) ﬁrst)step)when)using)Stata(AerdoubleL clicking)on)the)Stata)icon,)thatis)) • File) !Log !Begin:) • Stata)will)promptyou Often data is imported into Stata with string format dates such as 10/09/1986 or 9oct1986. split lnum, destring Parts of "lnum" that actually represent numbers will be turned into numeric variables — but only if there are numbers throughout for a given new variable. When I first concatenate the string variable and then destring without specifying float I get what I need. See the official Stata help for destring and Stata help for encode. g. Make sure to save this file. num_dx is a straight numeric conversion of the string in dx. ACCOUNTING 101 Learn how to map customized maps in Stata. 2. dct ﬁles, HHID and PN are read as strings! • Concatenate strings with “+” then destring because the RAND ﬁle uses numeric (long) hhidpn! • Beware of precision issues with hhidpn, In Stata, -i. Thanks in advance Delia I added a new variable to my dataset. For Stata, red color means error, in this case it was expecting numeric variables but some values have letters attached so Stata reads them as string characters. Specifically: “variable” - In Stata this refers only to columns in the active data set. e. Some very basic commands for STATA Set more off (turns off the requirement to press the enter key) To read in your excel file: insheet using "F:\file name. Computing new variables using generate and replace. Any variable labels or characteristics will be copied to the new variables created. Stata has many tools for working with dates. . The first line of syntax reads in the dataset shown above. . Panel Data in Stata. This only works if your original string variable is spelled consistently. Stata is still recognizing it as a letter of 1 or 0, not a number. Older versions of Stata. ). Following is an example of a dictionary file (for Level 1) for STATA: Keeping variables is done with: Æ Syntax: keep varlist Æ Example: keep year91-year99 For keeping observations you use: Æ Syntax: keep if exp or keep in range [if exp] Æ Example: keep if gender == “male” destring After importing data into Stata from external sources, variables containing only numbers are sometimes saved in string format. With destring, you need to specify either the , generate() option or the , replace option; Notes. could be numbers. Can any one know the solution to > convert the numerical variable to string variable even if the variable > has 11 or more digits. The replace option tells Stata to replace the current string variable with the new numerical variable rather than generating a new variable. "MULTENCODE: Stata module to encode multiple string variables into numeric," Statistical Software Components S456993, Boston College Department of Economics, revised 21 Jan 2009. will place variable gender at the current column of income and will move all variables, including income, one column to the right. replace speciﬁes that the variables in varlist be converted to numeric variables. Perhaps applying -destring- to the string variable with numeric content is the easiest thing to do first. Unlike packages that read one observation at a time, Stata keeps all data in memory, which is one reason why it is so fast. charlist displays a sorted list of the distinct characters present in values of a string variable. I need them converted to numeric variables so that I can generate a new variable with them. gov) follow us @StataRGIS and @flaneuseks The “match_pair” variable for reach non-restater contains the observation number of the restater that the non-restater has been paired with. 76 . Paired t-test using Stata Introduction. so the independent variable is repeated for multiple households. This is pretty unlikely, but a fellow can still dream. dataset. I want to replace "aaaa" with "31decaaaa" and destring the obtained variable. All values of the variable must be numbers. This command is used to convert string variables into numeric variables and vice versa. Usually, that variable is now string because of some mistake. Stata will not accept such variables as numeric, but the solution now is simple. Converting String Values to Numeric: destring. g positive in nity) thus they are included when you use generate heavy if weight >= 4000. If varlist is not speciﬁed, destring attempts to convert all variables from string to numeric. 1 Cheat Sheet For more info see Stata’s reference manual (stata. • To transform a variable into a numeric variable from string (alpha-numeric) variable: – destring variable_name, gen (new_variable_name) – Or, destring variable_name, replace – You can also use the encode command in this purpose: encode var_name, gen (new_variable_name) • To rename a variable: – rename var_name new_var_name Stata | FAQ: The destring command. , there were no significant outliers), assumption #5 (i. 3 Missing Values My comments are basically the same as the other commenter. – change string variables to numeric variables: destring n_age, gen(n2_age) 19 Destring variable - Statalist - The Stata Forum. Stata does a nice job selecting which numerical format your data should be in, so you probably don’t need to think much about the difference between byte, int, long, float, or double again. It also explains pros and cons of a Destring variables with Stata - Duration: 15:50. For a list of topics covered by this series, see the Introduction. The command -log using lename- speci es that (from then on) what you type and what Stata produces in response is stored in a log le. * A closer inspection of the variable, for the years 2000 the format changes, we need to create a new variable with a uniform format. Create a new variable is numeric. Para pasar variables de cadena a variables numéricas. Alternatives: gen heavy=0 replace heavy=1 if weight>=4000 For example, the variable of Level 1 would not be there, except initial 17 items (up to HHS No. * A closer inspection of the variable, for the years 2000 the format changes, we need to create a new variable with a uniform format. com destring — Convert string variables to numeric variables and vice versa Syntax Menu Description Options for destring Options for tostring Remarks and examples Acknowledgment References Also see Syntax}, year = {}} your command uses string variable, you need to use quotation mark. If your data passed assumption #3 (i. For general questions regarding data sources, statistics, software or additional training please contact DSS at

[email protected] destring. Destring date variable - Statalist - The Stata Forum. for the variable that you want to exclude, arrange it to be the first or the last. Variable and value labeling across 244 Demographic and Health Surveys; Documenting variable and value labeling across a lot of data files; Variable exploration in many files, cont’d; Getting correspondence from messy surveys: finding equivalent variable names; Stata: Using S_ADO to reference files from your program w/o an argument Stata datasets are rectangular arrays with n observations on m variables. …String data is common…and examples include geographical information,…gender information, think M, think F,…or possibly date information Destring a variable in stata keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website Destring in Stata If you are working with a dataset that comes from a country where the decimal separator is a comma and the digit group separator is a dot, Stata will read a variable containing these as being a string. While useful for a human eye, a computer can't glean much from data in this format. “macro” - What we would consider a variable in other languages. IMPORTANT: When viewing numeric variables in the data browser, they appear in BLACK text (or BLUE if they have a label applied). For instance, if variable "lnum" is "60 30" for one case and "50 ab" for another, new variable "lnum1" will be numeric (with values 60 and 50) while "lnum2" will still The easiest way to convert string variables to numeric form is to use the encode command. I want 1-10 to show the responses people gave (The question was the same in both years: how happy are you with X on a scale from 1-5). Stata uses some programming terminology in unique ways. ” By inquiring with Stata using the help command, we see that the float variable type is much larger relative Start with: [strong]destring v1 v2 v800, force replace [/strong] Then use [strong]egen [/strong] to create a min or max for each variable. org destring id, replace ignore(`"'"') a single numbers like 1 is displayed but not the number in between these ', i. Using my first method (which I now realize was unnecessary) even without specifying float when using -destring- my hhid variable is stored as long and my pn variable as int, though when I combine them (hhidpn = hhid*1000+pn) Stata was storing this destring: Convert character vector to numeric, ignoring irrelevant distinct: Returns number of distinct observations in each column of a evens: Shortcut functions to return the odd and even values from a Tempvar creates a temporary variable which is valid only in a single execution of commands in do-files or ado-files. 11 Creating new variables generate and replace This chapter shows the basics of creating and modifying variables in Stata. But when -destring- returns “income contains non-numeric characters; no generate,” it is an unwelcome complication. Title stata. sex i. These five steps relate to generation of a new variable, and should be preceded by a summary of the old variable, and followed by a comparison with the new variable to make sure you did not make a coding mistake. 13) Use the merge command to merge this data with the Stata database we created at step 11). It's type is str14! All observations are numbers. with at least one option being required. If the variable is actually a numeric value that just happens to be stored as a string, see our FAQ: How can I quickly convert many string variables to numeric variables? Stackoverflow/Stata. com) Tim Essam (

[email protected] In this section we will see how to compute variables with generate and replace. Note added 2004: this package was written for Stata 5 and is now superseded by egen, concat() in up-to-date Statas. edu Have you tried typing [code ]help destring[/code]? Or looking at the manual PDF for destring/tostring? The destring function is a good example of Stata’s built-in functions having a knack for knowing what you’re trying to do and providing a pretty dataset. Writing macros in Excel can be long and involved. For any recomputations, use the replace command instead of generate. clear input str5 stryit "1" "2" "42" "666" "NAN" end There are several I have two variables in Stata, both numeric variables that have somehow been recorded as string variables. Be very cautious when you use the force option. This goes way back in Stata history. To create a new variable that corresponds to observation numbers (i. Here new ‘Date’ variable is named as ‘date2’. Thirdly, it is necessary to specify one or more variables (a variable list is allowed) following the command. country names, etc. charlist may, for example, reveal the presence of problematic characters in a string variable Stata is case sensitive. do 2Combined subject table of contents Item response theorySurvival analysis Linear regression and relatedTime series, multivariate Logistic and probit regressionTime series, univariate Stata has some great tools that really ease the process of including categorical variables Logistic Regression Diagnostics "When the assumptions of logistic regression analysis are not met, we may have problems, such as biased coefficient estimates or very large standard errors for the logistic regression coefficients, and these problems may You have to determine which variable to use. This makes it easy to do things like replace the value of one variable if another variable has a certain value with one line (replace v1 = 0 if v2 == “something” for example). Figure 4: Creating a new variable in STATA. A list of variables consists of the names of the variables, separated with spaces. the reason for the lower() function is in Use the destring command to as follows: destring Y, replace force Destring also removes any values that were not numbers (but text) and replaces them with an empty cell (. race Here, xi is first used to let Stata know that you will want it to generate and use dummy variables in the regression. Two-Step Method to Generate Dummy Variable in Stata: Step 1: generate rep2 = 1 if rep78==2. 07 (here I have both comma and dot - in other cases "observations" I have either only comma or only dot or another name, and the list exists in Stata but it is not assigned to the variable until we specify a label value statement. But let me refer here to the Stata help at help rename group. Display format is then to be assigned. destring is designed for situations in which you have a string variable, typically containing meaningful numeric text (e. destring is especially convenient because it can be applied to several variables at once. Step 5A (iii): Generate a new variable called \FIPSCODE" that contains the FIPS codes. Over the years, I've learned that STATA is a powerful data analysis software (data management, graphs and statistics): >>> If you are an undergraduate or graduate student, you may know what quantitative analysis you need, but you may experience difficulties using STATA to get those results, making your research harder. , 1, 2), which you wish to convert to the numeric variable it should properly be. g. Experimental commands: block: experiment on how to use the undocumented _request2 option; parallel_map: (undocumented) distribute tasks on multiple instances of Stata; based on -parallel-Installation Step 5A (i): Load theFILE2. This article will introduce you to some of the most useful and easy to use features. Where m is the mean of x, and sd is the standard deviation of x. e. If you're new to Stata we highly recommend reading the articles in order. tostring geocode, generate(str_geocode) Then use the string processing functions to get what you want. 3. Commands are written in lower-case. Let's start with the destring command first. 2”, and “-5. “macro” - What we would consider a variable in other languages. must. Let’s destring it: Notice the use of the options “generate” and “replace”. com) Tim Essam (

[email protected] com To see this, create two new variables called num_dx and num_dot. A guide to using Stata for data work. Before I can get the averages, I need to work with the date variable a little bit. This is the purpose of the reshape command. Any variable labels or characteristics will be retained. A Stata date is simply a number, but with the %td format applied Stata will interpret that number as "number of days since January 1, 1960. We always have to put quotes around a string in Stata so Stata knows what we are talking about. To convert those string characters into numeric you need to use destring command (type help destring for details) as follows. 2. There is a more direct way, as above. The variable name is most easily seperated since the name is a fixed number of Destring Variables with Stata September 17, 2019 September 17, 2019 Iftikhar Yasin Leave a comment This video explains how to change data type of variables from string to numeric by three different methods, using # Stata . The paired t-test, also referred to as the paired-samples t-test or dependent t-test, is used to determine whether the mean of a dependent variable (e. *Convert variables to numeric. Sometimes, depending on how your data is pre-formatted in the spreadsheet, STATA might just be too confused when importin and thus render In Stata, columns are identified by variable names. In a Stata training, one of the students wondered why after importing an Excel file of financial indicators into Stata some were read as strings. This is great because instead of having a red screen you'll now have a blue screen, which means that you can do some data crunching with your newly If a numeric variable is stored as a string variable in Stata, we have several ways to convert them to numeric variables. xtreg Help Variable list in STATA To convert, use the command “destring ”. Works well but only a few options and might change. 4. The "tricks and shortcuts" mentioned were introduced with Stata 12. gov) • Laura Hughes (

[email protected] g positive in nity) thus they are included when you use generate heavy if weight >= 4000. If you are new to Stata we strongly recommend reading all the articles in the Stata Basics section. g. Copyright 2011-2019 StataCorp LLC. replace speciﬁes that the variables in varlist be converted to numeric variables. There are three basic variable formats in Stata: string, numeric and date. Procedure destring offers ways to convert such a variable to a numeric variable, leaving the original values unchanged (if they consist only of numbers) or removing any non-numeric characters. num_dx is a straight numeric conversion of the string in dx. the whole, an integer-valued numeric variable with value labels deﬁned and attached is the best arrangement for any categorical variable, but a string variable may also be convenient, especially if you are producing a kind of composite identiﬁer. Stata can record your work in a log- le which contains what you type and what Stata produce in response in a smcl- le. g. Stata Output of linear regression analysis in Stata. Otherwise, you can use encode to convert string data into a numeric variable or decode to convert numeric variables to strings. There’s a limit of 2,047 variables in Stata/IC, 32,767 in Stata/SE, and 120,000 in Stata/MP. gov) follow us @StataRGIS and @flaneuseks Stata expects your MMT variable to be coded 1 and 0, so if you have entered it as a text variable you will have to change it: destring mmt, replace. charlist displays a sorted list of the distinct characters present in values of a string variable. Statalist. 1. The two main commands used in Stata when working with strings are tostring, destring, encode and decode. Rename multiple variables. > > Thanks and regards, > > RAJARAM. destring x, replace. With data like this . When time or efficiency is not a big issue, I opt to import everything as string, do the append, and then destring all variables: tempfile data save `data', emptyok foreach f of local files { // Import import delimited "`f'", stringcols (_all) // Append append using `data' save `data', replace } destring, replace Working with Dates in Stata. Here is an example: Where variable 1 is the question asked in 2010, and variable 2 is the same question asked in 2020. *Copy all string variables. Example: gen dscd=substr(variable, 1 ,(strlen(variable)-11)) Another thing which you may find necessary is seperating the names of the variables from the names of the companies. g. . Even though you see "numbers" on your screen, they are just characters to Stata. destring varname(s), options. Tab autocompletes variable name after typing part AT COMMAND PROMPT Ctrl 9 open a new . the stata command should deal with each company alone One is that Stata has found a perfect max and cannot get to a better point. It identifies the name of the time variable, the dates it covers, and the delta or the period of time that elapses between observations. Writing a macro in Stata is very easy. charlist displays a sorted list of the distinct characters present in values of a string variable. There is however a problem with this when you have missing values in the variable. In Stata 12, the new tsfilter command provides the Baxter–King, Butterworth, Christiano–Fitzgerald and Hodrick–Prescott ﬁlters. VAR1 is the first variable that you want to destring in your dataset, while VAR500 is the last. Destring a variable in stata keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website Stata is one of statistical software packages, like SAS, SPSS, MINITAB , or BMDP. destring dx, generate(num_dx) Now, create a version of dx that includes the dot, and then destring that variable. dta”, sheet(…), firstrow. You have stored your variables as string variable. To convert, use the command “destring ”. Merging two datasets require that both have at least one variable in common (either string or numeric). See full list on wlm. There are three basic variable formats in Stata: string, numeric and date. This will mess up your analysis if you don't recode. The _all command tells Stata to perform this conversion for all variables. To fill second option, click on ‘Create’ as shown in the figure below. , you had independence of observations), assumption #6 (i. com/site/econometricsacademy/econometrics-models/panel-data-models a) Look at the nlsw88dates2 data set. Mean age1 age2 [aweight = wt] Step 2 lincom Destring Stata. Strings are alphanumeric We included two options for the destring command. , weight, anxiety level, salary, reaction time, etc. the pathogen load data is not for household level, but represents the pathogen load in waterways for a cluster of households (10-20). “command” - The primary operation, e. Cox, 2009. If you prefer to retain the existing variable, you can generate a new variable that is a nonstring version of the existing variable. “command” - The primary operation, e. Por sintaxis: destring var2, replace - Est e comando conve rtirá l os valo res de la variable var 2 que son de cadena a valores numéricos destring var2, generate(var2_numerico) - Est e comando generará una variable var2_numerico con los valo res de la variable var 2 en valores numéricos You can click on the green triangle and tell Excel to treat them as numbers. My feeling is that the best way to proceed could be firstly destringing the variable YEAR and then adding "31dec". dataprep. The most important options are: Make sure that if your data is in the “wide” form, that the variable stem name (unem in the example above) is consistent across years and the year suffix is consistent. e Stata uses some programming terminology in unique ways. Our dataset contains the variable date, which was accidentally recorded as a string because of. b) Now create a stata date variable from the 3 variables which give questionnaire day, month and year. recode s1 to s4 (else = copy) into c1 to c4. Stata interprets GDP and gdp as two different variables that can co-exist in the same file. Click on the button. 2 Categorical string variables and [U] 11. 1. And since the id-values (str14) are different for all of the observations, after destringing, the single number shows up more than once. Merge – adds variables to a dataset. (For example, if your year suffix is 98, 99, 00, Stata will put 00 as a year before 99. 3). tostring geocode, generate(str_geocode) Then use the Since you really are not using the state variable as a numeric, convert it to a string. The two primary commands used for this are generate for creating new variables. Where From Jeph Herrin To

[email protected] In this article you'll learn how to create new variables and change existing variables. , weight, anxiety level, salary, reaction time, etc. destring`var', replace} Method 3 (in case when all new variables have standard, "unspecified" Stata names, such as var1, var2, , varj. 2. 12. 5 Strings containing numeric data If a string variable contains the character representation of a number, say, myvar contains “1”, “1. This command is used to convert string variables into numeric variables and vice versa. , 1, 2), which you wish to convert to the numeric variable it should properly be. •Missing values are given by “. c. A string variable will have words as its official 'values', whereas a numeric variable will always have numbers (although fyi strings can also include numbers). Stata for Researchers: Usage and Syntax This is part two of the Stata for Researchers series. Another window, ‘Expression Builder’ will appear. Variables being numeric or string is in the first instance a matter of variable type or storage type. Otherwise, you can use encode to convert string data into a numeric variable or decode to convert numeric variables to strings • To inspect the type of variables, look at the ^Type column in the Variables window or type: describe [varlist] Rarely will your data or variables come formatted the way you need them. We will create standardized versions of three variables, math, science, and socst. Because the hashtag code assumes the variables in the interaction term are categorical, it is necessary to define numerical variables as numerical with the -c. 07 (here I have both comma and dot - in other cases "observations" I have either only comma or only dot or another Stata. , two groups of participants that are measured at two different "time points" or who undergo two different We begin by demonstrating when to use **destring** and **encode**. alter type s1 to s3 (f1) s4 (f6. A quick browse at the data indicates the presence of hyphens (“-“) and that these were used in different ways: one to indicate a negative number and another to indicate a missing observation. By using the destring command ([D] destring), the variable mistakenly stored as a str4 can be converted to a numeric variable. A Practical Introduction to Stata Mark E. VARIABLE IN STATA Variable names may be 1 to 32 characters long and must start with a-z, A-Z, or _ and the remaining characters may be a-z, A-Z, _, or 0-9. Number of unique values taken by a variable for a subset of the data, within a loop; In Stata, make a binary factor variable out of a 6-level factor variable; Negative binomial alternative to Sergio Corriea’s ppmlhdfe command in Stata; Stata / Loops to delete every 9th-15th observation out of 15,000 observations In Stata you can create new variables with generate and you can modify the values of an existing variable with replace and with recode. ” to indicate the type of missing values. Stata stores missing values as positive infinity, i. 1. The table you are asking about is from this separate, manually created spreadsheet. charlist may, for example, reveal the presence of problematic characters in a string variable Each row is then considered an observation. ” Byte indicates that the variable is stored as an integer between -127 and 100. 4. do repeat #conv = s1 to s4 / #ori = c1 to c4 / #flags Merging mechanics in Stata with an original data ﬁle • If you want to join data to individuals, the linking variable is hhidpn • In most HRS Stata . drop if countrycode=="" You still need to reshape the data so that the years are in their own variable, rather than in the variable names. For example, to take the natural log of v1 and create a new variable (for example, v1_log), use: gen v1_log = log(v1) For additional help, see the help files within Stata (for each of the following topics, enter the corresponding help command): Paired t-test using Stata Introduction. 1. Missing variables. , log book value gen ln_book_value=ln(offer_price*shares_outstanding) To generate Those experienced in Stata choose your topic. In Stata, we can use letters. Henceforth, 20 is completely random, write whatever the Here we are using a combination of string extraction substr, converting string to numeric destring, generating a date format gen date = mdy( ), dropping the variables we no longer need drop, and Then, what is a byte variable in Stata? Here we can see that the storage type is listed as “byte. Need to change the format of certain variables? a. This makes us write 7 Dictionary files for extracting the Consumer Expenditure data of Uttar Pradesh. dtadatabase le into Stata. The second command formats the numeric value so that when Stata displays the date, it is in a form that is easy for humans to read. It gives: Age: contains nonnumeric characters; no replace If you want to replace the existing variable, the command is simply destring [varname] This will replace the existing specified variable with the same data but now in a nonstring format. 2011). " Stata deals with missing variables in di erent ways depending on the command: I generate: Stata treats a missing value as the largest possible value (e. g. (If any one ob Use the destring command to as follows: destring Y, replace force Destring also removes any values that were not numbers (but text) and replaces them with an empty cell (. " Addis Ababa University. a very large positive value, i. Dev. Variable and file names can be in upper and/or lower case, but consistency is necessary. 14) now do some data curation steps to change prices to numbers (destring command) and generate a newly formatted date. To obtain summary statistics of all the variables in the dataset, simply type summarize. de Stata for Students: Creating Variables and Labels. encode does not work; recast does not do the job. g. 3 Factor variables. Please report any error, typo or questions on the training pages to Oscar Torres-Reyna (

[email protected] The date is stored, however, as the number of days since January 1, 1960. " but many datasets store missing values as -99, 9999, etc. You could use Converting string variables with numeric values One method of converting numbers stored as strings into numerical variables is to use a string function called real that translates numeric values stored as strings into numeric values Stata can recognize as such. , two groups of participants that are measured at two different "time points" or who undergo two different In this case, the 'destring' command comes in handy. Define local macro mcode and month, then rename the 12 vars in the foreach loop. The course covers everything from the very basics, in order to get one up and running in Stata, through to an overview of the Stata commands available for preliminary data analysis, data management, importing and exporting data formats and the creation of graphs in Stata. , (missing values). destring varlist, generate Before using a time series analysis, tsset tells Stata how your time variable is stored. , 1, 2, 3, etc. BibTeX @MISC{_titlestata. . , your data showed homoscedasticity) and assumption #7 (i. I'm having difficulty with creating indicator variables in a dataset in long format in stata. have the same name. tsset date . 0 destring _all, replace force PS: Sorry if the question is really basic, it is my first day with Stata. Where rep78 equals 1, 3, 4, 5, rep2 will be populated with missing values (. Kind Regards, Mbusi The encode statement is telling STATA to destring the variable while the generate ("") statement tells STATA to give the new destringed variable the name of the expression inside the parentheses. Yet, using tempvar is more efficient. . e. To use recode, you must provide a list of variables to be recoded and the rules associated with that change. Convert string variable to numeric variable use the encode command or the destring command b. Alternatives: gen heavy=0 replace heavy=1 if weight>=4000 Convert Character variable to Numeric. . You will need to use the destring function to make your variables into numeric variables so that Stata can process them in the way that you want. e. 3 instead of generating all of those dummy variables, a faster way to run the same regression is: xi: reg lwage school exp exp2 afqt i. The appropriate Stata command is xpose To convert numeric variables with a string (numbers in red) format into numeric we use the command destring destring , replace As you can see some variables were replaced by a numeric format but others did not (see along the red line, the screen may differ a bit from what you see) because they contain some string characters. But, in any case, even if the country is coded as string, and you want to give it a numeric code, you can use the following command in Stata (assuming the original country variable is named "country"): egen country_code = group (country) Stata Data Management Workshop . Keeping variables is done with: Æ Syntax: keep varlist Æ Example: keep year91-year99 For keeping observations you use: Æ Syntax: keep if exp or keep in range [if exp] Æ Example: keep if gender == “male” destring After importing data into Stata from external sources, variables containing only numbers are sometimes saved in string format. How to destring a time variable (7:00) using Stata? I have tried destring: however, the : prevents the destring. For this example, let’s load the auto training dataset and run the describe command: sysuse auto, clear describe variable name that identifies the time variable. Nicholas J. Amethodoften seenistoproducestringvariables withtostring (see[D] destring), for example, Downloadable! catenate generates a new string variable by concatenating varlist. In Stata you need to convert this string variable to a date variable. A macro in Stata begins with the word “global” or “local”. g. Change date format to number of days so that it may be used in analysis. I also have a separate string date that I was able to destring and convert to a double. https://drive. 2”, you can convert the string into a numeric value by using the real() function or the destring command. In the example below, variable female has value -999 indicating that the subject refused to answer the question and value -99 indicating a data entry error. The variables in varlist may be string or numeric. 1. sysuse auto, clear A string variable shows up in red in the data editor: Although it may look the same as the variable CIH_2, Stata cannot do any calculations on the string variable (since its format is telling Stata that it is made of letters or other symbols). If a variable is string, then typically Stata refuses to do calculations. before the destring command the values of tam_loc are coded as strings, and afters they are represented as a byte ( a format for numbers). The “force” command is needed here only because some years a variable is coded as a string and others numeric, so this just tells Stata to bypass that quirk. "Format" in Stata doesn't mean variable type. if data field tags do not satisfy Stata's variable name requirements, an attempt will be made to substitute them with t_TAG, for example, if the original tag was 1984(number cannot be used as a variable name) then the substitute tag will be t_1984; destring/tostring, replace or destring/tostring, generate () converts string variables to numeric variables and vice versa. The common variables . help destring Watch how to convert a string variable to a numeric variable. csv" To replace nonnumeric data: destring variable name, replace force To generate a new variable, e. 15:50. , log book value gen ln_book_value=ln(offer_price*shares_outstanding) To generate Because of this not able to convert numerical variables with > 11 or more digits to string variable. In the example below the time variable is stored in “date” but it is a string variable not a date variable. regress, use, display. " Stata deals with missing variables in di erent ways depending on the command: I generate: Stata treats a missing value as the largest possible value (e. how to destring a variable in stata