Stata recode string variable. However, if myvar were string, .
Stata recode string variable. That's what it's telling you.
Stata recode string variable I tried to encode the variable and then recode but it does not work. ", which can't be in the name of a variable. I've tried: recode * (""=="NA") Recoding quantitative variables You might want to recode a quantitative variable as a categorical variable. recode is meant to change the values of numeric variables to other numeric values; not to strings. # specifies the cut-offs with its left-side being inclusive. Your Gender will not work with recode. You have many string categorical variables to recode, and do not want to have the same number re-used on unrelated categories. A string containing just a space or spaces is not an empty string; it's not often informative, but that's a human issue. 1 Description The word string is shorthand for a string of characters. , and N. count if q1 == "Stata" or if q1 is a numeric variable in which Stata is represented by 5, type . 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. In Stata, string variables are easily identifiable when you open the data browser or run codebook commands. Hi Community, I need to recode the original string variable ragender into numeric type and assign new values to it, namely, assigning 1 = 0 for Male and 2 = 1 for Female. Stata Technical Bulletin 59: 5–6. It next informed encode works on strings. We can replace certain specific values, or ranges, like 5-19 or 28-752. If you have a string variable that has only numbers in it, then you 3. First, recode only works if the incoming source variable is numeric. Okay, it seems like it is recoded into the new 3-category variable! The last step is to assign new variable name If you have a string variable and want to convert it to a numeric variable, you can use the encode command. Let’s start with the destring command first. , a string variable. The destring command. I think you want to label your values:. Chev. Dummy variables are also called indicator variables. It creates a new variable, and assigns a numeric value to each of the string value. Olds 98 21 4060 3. I have tried several alternatives, most recently based upon Nick Cox's post here: recode provides a convenient way to define value labels for the generated variables during the defini-tion of the transformation, reducing the risk of inconsistencies between the definition and This module shows how to create and recode variables. I want to change the ". : You stated that your gender variable is numeric, with labels. strrec may also be A dummy variable is a variable that takes on the values 1 and 0; 1 means something is true (such as age < 25, sex is male, or in the category “very much”). to which Stata responds: too few variables specified r(102); I also tried string must be enclosed in double quotes, unless you provide the name of a variable that has a string storage type. Commented Aug 14, 2015 at 12:29. For example, you might want to convert a continuous reading score that ranges from 0 to 100 into 3 groups (say low, medium and high). The typical Stata job involves considerable recoding of variables. To recode that as 0 and 1, I would create a new dichotomous variable called female where female==1 and male==0. If you have string The easiest way to convert string variables to numeric form is to use the encode command. Normally, the recoded variable is not supposed to replace the original variable; rather, you will add the variable with the recoded vlues to the data set under a different name. To determine the numeric values, tabulate without labels. In my data set I have a string (str3) type variable COUNTRY (see below). It is recommended to always use the generate() option with the recode command, so that your original variable remains intact. If so, remove them. g. For example, if you wanted to inspect the coding of 此外，test()选项还能测试recode命令是否应用了所有规则，如果有规则没有被使用，将会显示警示。如下：数据集中并没有10这个数值，因此这个规则指定一定是无效的，加上text()选项就会提示有至少一条规则没有生效：. ). Consider the conversion of the FIPS state code to the IRS state code. 5Reference Please read [U] 12 Data before reading this entry. This is where the encode command comes in Stata. Also see [D] rename group — Rename groups of variables [D] generate — Create or change contents of variable 注：本文为 Stata 学习笔记，主要参照教科书： Baum, C. They can contain anything from letters, numbers, and spaces to other special characters. Cox. As we will see shortly, in most cases, if you use factor-variable notation, you do not need to create dummy variables. For example I want to use an if condition like if any value in Ucod starts with I (e. Recode¶. 2 y . 6destring— Convert string variables to numeric variables and vice versa We want to remove all of these characters and create new variables for date, price, and percent Recoding variables using recode. Note that this problem can only arise for string variables, so you need to work on Data on multiple responses in this structure can be used immediately for many analyses. A variable of type byte was sufficient to hold any of the numbers that were created from the string values stored in your variable. 10, pp. It does not have missing cases. Any help would be Using recode command: recoding categories within one variable. How do you that? With a string function. Stata’s mvdecode command comes handy for us. "'s to "OTHER. Stata thinks a space is a non-numeric character and so makes a string variable. use afewcarslab (Afew1978cars). At 03:59 3-9-2003, you wrote: Dear Statalisters I am trying to recode a string variable and am having a hard time. Basics. Step 3. – Nick Cox. On a déjà vu un exemple de format natif Stata avec les données auto utilisées dans le chapitre précédent pour illustrer les principes de base de Stata : il s'agit des fichiers DTA. If you are referring to string variables with literal values "missing" which should just be replaced by the empty string "", then that would be a loop over all string variables: Although to Stata a variable is a variable, it is helpful to distinguish among three conceptual types: categorical variables are stored as strings. Variables may either be recoded into numeric variables or into string variables. recoding variables cut() egen newvar = cut(var),at(#,#,,#) provides one more method of recoding numeric to categorical variables. Values that do not meet any of the conditions of the rules are left unchanged, unless an otherwise rule is The question is explicitly about Stata but the code looks little like Stata. However, you need to use a command called replace instead of recode. Good afternoon, I use Stata SE/14. How can I recode continuous variables into groups? | Stata FAQ There may be times that you would like to convert a continuous variable into groups. , "CYC" for consumer cyclicals). . , " recode changes the values of numeric variables according to the rules specified. I have a problem in Stata. We will need to convert these variables to numeric data before we can use them with Stata's statistical features. Method 1 may not be the best way of recoding missing values into different categories. stata. list make foreign make foreign 1. 3 . My command is as follows: gen str8 race= PT_RACE this command worked, I then tried to recode using the following command: recode race=1 if PT_RACE==RAC101 (the race variable is coded as RAC101, RAC102, etc. comCo A float variable (or a double, according to set type) is created if the result is numeric, and a string variable is created if the result is a string. Recode Variables: Command recode. Smith” and “P. Let's for example look at Freedom House's categorization of the countries of the Data - Stata (13+) format (*. I want to generate a new string variable for state abbreviations based upon state names. It creates a new string variable that gets its variable values from the previous label values. A few individual characters may have caused this, or perhaps metadata have crept into the first few observations. In Stata an empty string "" is regarded as a missing string. When I tried, it said type mismatch I have tried the real and the encode commands, none of which are working. 2Categorical string variables 23. “Male” and “Female”, “yes” and “no”, and “R. In Stata you can create new variables with generate and you can modify the values of an existing variable with replace and with When showing example data, always use -dataex-. My data looks like the following (simplified): ID a b c 1 x . The first column shows the code you would use, the second column shows how your data might look like before applying the code, and the third column shows how your data would look like after applying the code. "One" is unlikely to be recoded as 1, and those values that already look like numbers are likely to get scrambled to different numerical values. -help datatype-Code: You have included the character ". w . 13. Find the dash. I have two variables in Stata, both numeric variables that have somehow been recorded as string variables. , it cannot be used for string variables); e. recode is for numeric variables only, you can use replace. Step 2. " generate—Createorchangecontentsofvariable Description Quickstart Menu Syntax Options Remarksandexamples References Alsosee Description generatecreatesanewvariable Tomasz wrote: I have a beginner's problem. String variables are ignored by mvencode. The solution here is to never mix Stata recognizes these non-numeric values as “string” values, and their variables are called “string variables. J. where is a str1 in the following example: . https://www. The dataset attached is malformed for Stata purposes as metadata appear in the first observation and as a side-effect all variables are string. If you wish to change the categories of a variable, you may employ the command recode. There is an easier way to recode mpg to three categories using generate and recode. g, I234, I345, I587) recode the whole value to CVD. I have a variable in Stata which consists of letters such as A, B, AB, AC, etc. Rename variables; Delete variables; Sort dataset; Create an id number variable; Order variables; Generate. In the folowing toy-example, a -string- variable with a trailing blank is created and, as expected, the first attemp to create a numerical variable assuming that the -string- variable displays as “male” and “female”, just as the underlying string variable sex would. Step 1. Before you recode the quantitative variable, it is a good idea to inspect its coding. The codebook command above shows that variable female has three types of missing values and 4 missing values. Converting string variables with numeric values. In this variable I wanted to recode numeric country codes (Country ID) into country names (e. In addition to demonstrations of recoding, I provide so Recoding string variables with multiple numeric and nonnumeric values per cell? 24 Sep 2018, 05:54. It is probably simplest for you to repeat import excel or import delimited and flag that the first row of the data file is to be treated as indicating variable names. 4 . Note that there is a decode command that will do the reverse of encode: it will convert labeled numeric categorical variables to string The minimum and maximum values of sbp are 65 and 120, respectively, for category "0" of hisbp. This video demonstrates how to convert categorical string variables to labeled numeric variables in Stata using the *encode* command. This means that chol is stored as a string variable that holds three characters. Now, the problem is that the question asks me to generate a new variable within the age rage of 15-50 year old. mvencode first informed us that make is a string variable—this is not a problem but is reported merely for our information. 《An Introduction to Modern Econometrics Using Stata: Stata Press》学习整理而得，内容未必完全正确，会随学习过程的推进不断补充、修改和更正，请谨慎参考，如有错误欢迎指正。 一、字符型转化为数值型（string-to recast—Changestoragetypeofvariable Description Quickstart Syntax Option Remarksandexamples Alsosee Description recastchangesthestoragetypeofvariables. Is there any way to code . dm83: Renaming variables: Changing suffixes. The keywords min and max may be included as a from-value, as well as a to-value. Jones” are examples of strings. An indicator variable denotes whether something is true. You can also define value labels for it by putting The message tells you waht the problem is: -recode- only works with numeric variables, not string variables. 4Complex strings 23. 1 Continuous,categorical,andindicatorvariables 26. Hierzu wird der Befehl recode verwendet. This time In all likelihood, you have stray blanks in your -string- variables. VW Rabbit 25 1930 2. replace myvar = myvar[_n+1] if myvar == "" would be correct syntax, not the previous command, because the empty string "" is string missing. As for what you should do, that depends on what you mean in Stata terms by coded "missing". For one thing, we have to do it one variable at a time. 1 Convertingcontinuousvariablestoindicatorvariables 26. The commonest way to achieve this is probably by using the encode command, i. See similar questions with these tags. The syntax diagram shown in -help recode- starts with -recode varlist -, meaning that you can recode a whole list of I've tried to use the recode command (e. Let's use recode again to create a new variable named hisbp2. There are many ways to recode variables and how this is done can have a substantial effect on runtime. Please anyone help me out with this. But the customary code resulted in significant deviation in the appropriation of Downloadable! strrec recodes string variables according to rules. We could have labeled the categories of hisbp in our recode command. They are called variables because their Learn how to recode variables in Stata. , a specific value, I've run a script in Stata but now want to move my dataset into R. For string variables, recode does 2recode— Recode categorical variables Menu Data > Create or change data > Other variable-transformation commands > Recode categorical variable Description recode changes the values of numeric variables according to the rules specified. May I insert here a plea that Stata integrate into the help files the first part of the Regular Expression FAQ so that the fans among us Just directly applying -recode- to this variable is likely to get you in trouble. z . Then, we use recode to convert mpg3a into three categories: min-18 into 1, 19-23 into 2, and 24-max into 3. Example 3 We can drastically reduce the size of our dataset by encoding strings and then discarding the underlying string variable. You want whatever lies between position 1 and just before the dash. If a numeric variable is stored as a string variable in Stata, we have several ways to convert them to numeric variables. I am struggling to generate this variable since the values are saved in ranges not in simple numbers. Standardization: z-scores; Recode. decode works on numeric variables that has attached value labels. variable displays as “male” and “female”, just as the underlying string variable sex would. “name”, “name”)- which calls values from a string variable and tells Stata to use only values that make: string variable ignored rep78: already 1 in 2 observations foreign: already 1 in 22 observations no action taken r(9); Our attempt failed. One difference is that string values go in quotes; When you use recode to create a new variable, Stata will automatically create a variable label for it (“RECODE of ”). VW Rabbit foreign 2. encode is the command for mapping arbitrary string variables to numeric variables with value labels. 6[GSM] 11 Creating new variables generate with string variables Stata is smart. Copy of an existing variable; New variable with a specific value; New variable based on an expression; Rounding; Logarithmic transformation; Substring; Date variables; Egen. Recoding string variables builds on the same principle as for numeric variables. breakfast = 1 if meal== [then something saying contains eggs, bacon, etc. I have tried using strpos() Since ‘age_grp’ is a string variable, Stata cannot use it to run regressions. The recode command in Stata can be used to convert a continuous variable into a categorical variable, and can also be used to condense a categorical variable. , replace [var]=1 if [var]=="One") but haven't had any luck. Faster Recoding. However, a more convenient way for the problem at hand is strtrim(), which removes leading and trailing spaces. See Beschriftungen über Recode. R is treating all Stata missing values as 0, so I want to recode them all in Stata as "NA". , recode [var] ("One"=1) and replace command (e. The destring command might be the first choice for converting string variables to numeric if we have a limited number of non-numeric characters. The variable racen is a numeric variable where 1 represents Black, 2 represents Other, and 3 represents White. La spécification de ce type de fichier peut être Old and New Values. Quickstart This video shows you how to recode categorical variables in Stata, including how to reorder categories, collapse categories, and create dummy variables out o The maximum number of characters in a string variable in Stata is not 16, it is 2,000,000,000. 0 for Windows. It's all or nothing. Stata thinks you intended perhaps a factor variable or time-series operator, which the destring command does In diesem Video wird gezeigt wie man Variablen in Stata umkodiert. ] It's for variables that are essentially numeric in content, but have been misread somehow. Here's a simple example. I recode allows you to refer to the minimum and maximum of a variable in the transformation rules. Besides applying the commands below to data, you also may What are string variables? String variables are essentially sequences of characters. Once you click Old and New Values, a new window where you will specify how to transform the values will appear. Method 2: Using command mvdecode. gen female=. The first line of syntax reads in the dataset shown above. But it won't work with mip because mip is a string variable. Recode numeric variables note that the help/manual for -recode- are quite clear: it applies to numeric variables only (i. By default this command will overwrite the original variable. This video provides a general overview of approaches one can take to recode variables using Stata 17. " Is there an easy "replace" or "recode" command to do this for a string variable? generates a new group id with values from 1 to 4 for the categorical variable region and then converts the id variable to a string. Then same advice as above. 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? Let’s say read into Stata as string variables because they contain spaces, dollar signs, commas, and percent signs. With For example: if you have continuous variable that you want to categorize, if you have a categorical variable for which you want to collapse categories, if you want to reverse the coding of a variable, or if you want to change any value(s) into missing. . 5 String Variables. 2006. 4 System variables ( variables) Expressions may also contain variables (pronounced “underscore variables”), which are built-in system variables that are created and updated by Stata. Forgetting variables, note these examples. Copying previous values downwards: the cascade effect 26Workingwithcategoricaldataandfactorvariables Contents 26. College Station, TX: Stata Press. If all variables are string, as in this example egen's concat() function is an alternative. That leaves the usual "gen + replace" method, or encode. For example, you might want to know how many respondents use Stata. ) when I put this command in it reads: =exp not I have a string variable with abbreviations for different sectors (e. The recode command replaces different values on one variable to some other variable. That's what it's telling you. '040' is being replaced by 'Austria' etc. To do so, you can use the “codebook” and “summarize” commands. Jenkins, S. Value labels will be defined for numeric variables. 1. dta) SPSS Syntax (*. Any string in var that does not meet the conditions of rules is set to missing in created numeric variables and copied from var in created string variables. 1 Old Value: Specify the type of value you wish to recode (e. I want to change to numeric, with values numbers instead of letters, such as 1 instead of A. 1. gen() Add this if you want to generate a new variable with the recoding. Here, we are going to use the example by STATA “hbp2. If your ID variables are 18 characters, then -destring-ing to numeric will inevitably lose that level of 用encode把字符型变量改成数值变量的问题,用encode(var1),generate(var2)，总是出错我想改的不是变量名，而是变量名下面的每一个变量，这些变量都对应一个代码比如我有个变量时industry，我就想把下面每一个industry变成一个数字代码那应该是encode(industry=Oil and Gas Exploration),generate(industry=6004)吗，我试了很多 Create numeric version of a string variable: list: Lists the observations: rename: Rename a variable: recode: Recode the values of a variable: notes: Apply notes to the data file: generate: Creates a new variable: For example the code (0/140=0 F) tells Stata to recode all values of total between 0 and 140 to 0, and then give the label “F This page shows examples of how one might use string related commands in STATA. We have a string variable, sex, that records each person’s sex as “male” and “female”. What encode does is assign a numeric value to each category of a variable. dta” I have dataset in which age variable has values that go in ranges such as 15-20 30-40 etc etc. This will allow us to use racen with Stata's statistical features such as regression modeling. 34–35. clear set more off input /// byte bytevar 1 2 3 end // add value labels label define lblbyte 1 "A" 2 "B" 3 "C" label values bytevar lblbyte // list list // but they are really numeric values list, nolabel is a legal expression which yields 0 whenever VAR1 doesn't contain the literal string and its integer position whenever it does, What it doesn't do is take the comma-separated strings as alternative arguments. but it may be used to rapidly and easily compress long strings into single bytes. Both give similar numeric variables (which are preferred over string because some 7. For example, the ‘sex’ variable has two categories, ‘male’ and ‘female’. destring works on string variables that contain numbers stored as strings I want to recode my variable Ucod in Stata with >100000 different observations into 3-4 classified values in the form of a new variable. tab gender, nolabel Let's assume the output reveals that gender variable is coded as male==1 and female==2. Probably, the spaces are meaningless. The problem is that I don't want to enter all the values of Ucod to recode. e. I am using Stata/IC 10. It is good practice to generate Explanations: varname: Insert the name of the variable. My survey and subsequent data set (n=2,682) contains five string variables that include four "check all that apply" response options. We can create a numeric variable named choln from chol using destring. 2001. I would like to recode a string variable which includes different answers like "I like red" or "red is my colour" and so on. 23. ” In Stata, there are a few ways of converting string variables (with non-numeric values) to numeric variables (with numeric values). -recode- has no problem with recoding to missing. Is there any way to code a binary variable dependent on keywords being present in a given string variable? Simple example: I have a string variable that describes various meals and a dummy variable that denotes if a given meal is breakfast or not. For example, in nhanes2 Here are some of the most essential techniques for generating and recoding variables. In the latter case, if the string variable contains values greater than 2,045 characters or contains values with a binary 0 (\0), a strL variable is created. Wenn Sie mit recode eine neue Variable erstellen, erstellt Stata automatisch eine Variablenbeschriftung dafür („RECODE of “). You can create and change string variables with gen and replace just like numeric variables. When you generate a variable and the expression evaluates to a string, Stata creates a string variable with a storage type as long as necessary, and no longer than that. Most problems involve missing numeric values, so, from now on, examples will be for numeric variables only. (!) What I think you mean to say is that the largest numerical variable storage type, the double, can maintain a precision of 16 decimal digits. (rule) Specify which values you want to recode and how you want them to change. Now I would like to recode via keyword the occurance of the word "red" into 1. How do you find the right one? Read help string functions. For example, is a person a veteran, does you have variables with negative values, recode them; see[D] recode. sps) Syntax to add variable labels, value labels, set variable types, and compute several recoded variables used in later tutorials. list make mpg weight make mpg weight 1. I need them converted to numeric variables so that I can generate a new variable with them. Sie können auch Wertebeschriftungen dafür definieren, indem Sie die gewünschte Beschriftung für jeden Wert am Ende der Regel einfügen, die ihn definiert. 3Mistaken string variables 23. destring chol, gen [GSW]11Creatingnewvariables3 . 3. What I want to do is to combine multiple variables into one. Reprinted in Stata Technical Bulletin Reprints, vol. However, if myvar were string, . The variables having values in red, however, are non-numeric and are recognized as string variables by Stata. And the minimum and maximum values of sbp are 122 and 720, respectively, for category "1" of hisbp. It is preferable to generate a copy of the old variable before you start replacing values (or expressions, which is the term used below). If q1 is a string variable, type . First, we make a copy of mpg, calling it mpg3a. P. If you would love to create a new variable using multiple variables, you need to use gen and replace instead of recode, since recode only allows us to recode within one variable. This command can only be used for numeric variables. We must encode it into numeric type. Create numeric version of a string variable: list: Lists the observations: rename: Rename a variable: recode: Recode the values of a variable: notes: Apply notes to the data file: generate: Creates a new variable: For example the code (0/140=0 F) tells Stata to recode all values of total between 0 and 140 to 0, and then give the label “F Recode Variables: Command recode. We can also check that by clicking on the high variable and looking at its properties, and we can verify that its type is “str12,” i. Now, you can see the new categorical variable is well-defined! Mission complete Using replace command: creating a new variable with more complicated rules. I also tried to generate a new variable with if but that also does not work. oxorchke rrn qtgnt ceyrr mjcmyyk udit bqhuld hinul akxqrej tgmnh zvzmyd jwddce jnyhs ccfmio lngmqb