Stata generate variable if string contains. The default separator is the space.

Stata generate variable if string contains category contains persons over 41. A, I would suggest using the substr function generate a new variable that contains the same string but without the first letter Recode missing values coded with a string in Stata. The word “female” has six characters, so our new From Michael McCulloch < [email protected] > To [email protected] Subject Re: st: finding non-numeric characters before I can destring: Date Thu, 18 Oct 2007 08:52:56 -0700 split splits string variables by separators into several components, and generates new string variables for each component taken out from the original string. Example 1: Dates. Similarly, I have a variable for the maternal highest educational level and a variable for the partner's highest edu level. There is a specific function in Stata 14+ to look for the last occurrence of a substring (e. I want to generate a new variable whereby at least 1 parent has a degree. The five commands below are often used to create or modify variables. ^, . string() string(n) is a synonym for strofreal(n) and Stata: Data Analysis and Statistical Software . 5 who are 53. agegrp i. Create a variable which is only a certain portion of a string variable in Stata. var1 may contain other words but I want to check if xyz or a certain phrase appears in the cell or not. Pat generate parentfigure=. So, the part state + "_" means add the string "_" after the content of the string variable state. " strpos doesn't seem to work because it will include REAPPLE. . J. What i want to do is create a separate variable for each drug type that returns a value of 1 if drug1-drug28 contains the following characters "(0)". These two variables are generated by egen concat and each contains a group of languages used in a country. 120" and so forth. leader A's first year in power was 1973 and I need to carry that relationship over 138 dyadic observations of that leader's first year. For example, I have a variable of jobtitle and the observations can vary "CFO" "Chief Financial Officer" "Chairman & Chief Executive Officer" end generate todrop = 0 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. 1, working with data that looks like this: the real benefit of Stata's Unicode regular expression functions is their much more powerful definition of regular expressions. Stata - Generate a dummy variable if any string variable of a list begins with specific characters. As in > > on the x-axis would have the values <2, 2, 4, >4. If the names are as in `c(Mons)', you could go tokenize "`c(Mons)'" forval i = 1/12 { replace x = m`i' if index(Y, "``i''") } Nick [email protected] Joseph Coveney > FUKUGAWA Nobuya wrote: > > Suppose we have string variable Y, and we would like to replace > variable X when variable Y contains certain characters such as > "Dec". 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. generate with string variables. We will show some examples of how to use regular expression to extract and/or replace a portion of a string variable using these three functions. Our dataset contains the variables date, price, and percent. If that is the case, then you can use . Wildcard syntax like this applies when a variable list is expected, i. For example foreach var of varlist data* { local newname = substr("`var'", 5, . Also, how is this treating missing variables? Any help would be appreciated. An expres-sion is a formula made up of constants, existing variables, o. appending the data. > e. or Code: generate byte non_numeric I want to generate a dummy variable which is 1 if there is any match in two variables. For example, "Spartanburg GS" would become "Spartanburg" and "Sitting string variable is created if the result is a string. From: Nick Cox <n. Products. I want to generate a new variable in Stata by grouping an old one according to Now I want to generate a new dummy variable that equals 1 if the person is still employed (contains "Manager" and "Employee") and equals 0 if the person Are you referring to a numeric variable with value labels or a string variable, because the answer will Title stata. B. Roger--Roger Newson 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. I want to do the following: Match observations if. -province- = 11, -city- = 6227 > > I want to create a new numerical variable called -newcity- which will > combine -province- and -city- like this: > > 116227 > > This is because I have to combine this data set with another, and the > unique identifying . 120 into 2 with label "10. 62" and when I try using destring, replace, I am told that my variables contain non-numeric characters. Say that variable group takes on the values 1, 2, and 3. , "1992 1 "). i. Parsing is the task of identifying the meaning of each piece of information, and often splitting the string up into separate variables. Stata 16 - create scalar variable using if statement. Hello everyone! I'm fairly new to STATA and I have data that I cannot seem to convert from strings to numbers. > > > After this two questions arise: > > 1. Note that we do not need to generate a new variable or replace an existing variable; we just get Stata to work with a version of the variable with extra spaces. Nick On Sat, Jan 7, 2012 at 4:55 AM, Joseph Coveney <[email protected]> wrote: > Shubhabrata Mukherjee wrote: > > I am using --insheet-- to read in a big file where some variables are numeric > and some are string. New in Stata 18. decode (see[D] encode) is the standard way to generate a string variable based on value labels. If the string of "investor_name" is a match with one of the others, then the investor name is correct. In other words, we want to write; replace X="m12" if Y (contains "Dec") replace X="m11" if Y (contains "Nov") replace X="m10" if Y (contains "Oct") . , and C. Besides the first variable id, which gives an identifier, the other variables (call them A to Z) contain either interesting strings or missing values encode—Encodestringintonumericandviceversa Description Quickstart Menu Syntax Optionsforencode Optionsfordecode Remarksandexamples References Alsosee Description Such 0–1 coding is in a sense arbitrary but makes life easier, especially for statistical modeling in which the response is a binary variable. tabulate with the generate() option will generate whole sets of dummy variables. 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. That's why the double quotes are needed to I added a new variable to my dataset. My problem is to convert these strings into variable names to do something like: gen test=1 if var1==string_var where, after the ==, I need some kind of conversion function to let Stata read the string e. Examples. Hello, I am trying to create a flag variable if another string variable contains a string at all. How can I write the latter part of command? I need to test whether var1 is equal to either var2 or var3, depending on the string that is contained in string_var. We will first explain destring method and at the end, we will also explain the real() command. So encode bransch turns all 10. Here, we are going to use the example by STATA “hbp2. I have tried to use indexnot() function but it yields false results as the characters in both strings are the same. dta) would I have a string variable with a lot of different categories. Below we see summary statistics for length. 4. N. The variable length contains the length of the car in inches. Some examples of expressions (using variables from auto. The command works only with numerical values of the states, and only after transforming the variable type to string. A. Imagine various families: contains 3 females, so values of female are 1, 1, 1 ; contains 3 males, so values of female are 0, 0, 0 ; contains 3 males and 3 females, so values of female are 0, 0, 0, 1, 1, 1 The only thing that deserves comment is the opening generate. Using Stata 12, I want to replace some substrings in a string variable. Example 2: We have a variable that contains full names in the order of first name and then last name. We wish to calculate BMI, which is defined as weight in kilograms divided by the square of height measured in meters. That means that 10. The first condition refers to a dummy variable (a) --> x=1 if a==1. From string to numeric variables. You should type keep if facility=="bir" That way, Stata knows that "bir" is a string value. However, when I do that, STATA creates a number which ignores all the values following comma. The “MDY” option tells STATA that the date_string1 variable has a month, day, and year – appearing in that specific way. The new variable should have missing values only when all three component variables are missing. Here is an example of my dataset: id1 id 2 Converting string variables with numeric values. But it may not be what she really wants. If the + operator appears between two string, then it means that Stata has to concatenate the two strings. 5 %ÐÔÅØ 31 0 obj /Length 1231 /Filter /FlateDecode >> stream xÚ XÝoÛ6 ÷_!äa ˆ!)R¢€u@3$E» Ùšl/i ™v„éÃ¥d' öÇï(JŽ­Ø¥œ—F O How to create string variable referencing other string variables in Stata? 1. I am interested in creating a dummy variable if text contains some specific cities, lets say Paris, Madrid, Berlin, New York. If you type . You can use them to search any string (e. Stata is smart. For calculating the number of words separated by a blank of a string variable, use Stata’s wordcount command: gen NEWVAR=wordcount(LONG_STRING_VAR) Extract the Hi. When I add the variable to the dataset, STATA recognizes it as a string variable. read into Stata as string variables because they contain spaces, dollar signs I want to automatically test if the string contains only one type of character, with the result in a true/false variable "check" input str11 contactno "aaaaaaaaaaa" "bbbbbbbbbbb" "aaaaaaaaaab" end my attempt codes for distinct answers, say, "42"for "cricket"or "1"for "Stata". The code in #2 generates a variable coded 1 for true and missing value for false. . Also, that Stata will parse into words, so that even (e. it can apply to variable names, but to use it with string values you need a dedicated function. Stata Journal 13: 862–866. I need to get the position of that different character. The order of the groups is that of the sort order of varlist. Setup. Hello, I am using Stata 15. Schechter. One recipe is. You can create and change string variables with gen and replace just like numeric variables. For example: I cannot figure out how to tell Stata to replace the value of a string variable only if the value of another (also) string variable is equal to "xxx"? To illustrate the problem: I need to merge two datasets according to the match in the name of the municipality (unfortunately, I do not have anything else that is common for the both datasets). All variables are string variables. Remarks and examples stata. 6. generate newvar = exp creates the new variable from existing variables through an expression. Some of my data has “NA” as a value, so is this causing the issue? you can generate a new variable to do all the above-mentioned tinkering. decode female, gen(sex) It is a string, and Stata automatically created the shortest possible string. Additional suggestions: regexm takes a long time, so I would do something more like . Stata 6: Generating variables that contain repeating sequences of numbers Author David Reichel, StataCorp Sometimes, it is valuable to generate a variable that contains a sequence of numbers in a particular pattern. where is a str1 in the following example: . cmpute: A tool to generate or replace a variable. The default separator is the space. group() I implemented your suggestion with my variable <number> using: destring number, generate (newno) force /*generate a new variable*/ list number if newno>=. indicator variables xi expands may appear anywhere in the varlist, so So far as Stata is concerned here, "*" is a literal character you are looking for and won't find. Do not confuse substr() with substr(), which extracts substrings; see[ M-5 ] substr() . 24Workingwithstrings Contents Pleaseread[U]12Databeforereadingthisentry. All features. If you generate the new variable mostlynumber, list number if mostlynumber>=. replace changes the contents of a variable. missing indicates that It has similar functionality for matching strings in the same variable within the same dataset -- but you could use it for data combination by appending the datasets, running -strgroup- on your merge var, and then spliting the dataset again so that you can merge on the group/match variable -strgroup- creates. > > How can I keep the variables that are string only? > > ----- > > After loading in the spreadsheet, you can drop the numeric What are string variables? String variables are essentially sequences of characters. ac. See [U] "facility" is a string variable and "bir" is one of the values "facility" takes. How can you delete observations from a variable that contains strings that have the specific word for instance. I was trying to count cases > with the following command: > > count if variablename == "string value" > > which, however, returned me 0 cases. rxname is contained in Product, OR may not be combined with by. Royston, P. ) rename `var' `newname' } Nick [email protected] > -----Original Message----- > From: [email Creating and Recoding Variables. (string(my_variable)) list my_variable if non_numeric. replace x = 5 if price == 4099 replace x = 5 if price == 4749 I want to generate a new variable x that is equal to 5 if price belongs to a list of values. For example, make contains first the name of the company that built the car and then the model of the car. I want to generate a dummy variable var2 equal to 1 if var1 contains a certain word 'xyz' or phrase. The new variable is the age of particular firms. gen price1 = price/2. For example, make contains first the name of the company that Hello STATA Experts: I am trying to create a new variable based on the existence of certain conditions in two existing variables (see code below). In most rows, Year just contains the 4-digit year (e. We have a string variable, sex, that records each person’s sex as “male” and “female”. I want to count the number of characters in each response/string and generate a new variable containing this number. How to get a substring that ends before a certain symbol. It is labeled. The string variable is a number sometimes > followed by the letter 'c'. The regex commands are tricky for me and it seems like most of the indicators (e. 5 String Variables. dta” It is shown that relativistic field equations for massless particles of spin j = 1/2, 1 and 2 possess a class of solutions which generate in a natural manner the string's coordinates Xmu(tau encode replaces each value in a string variable with a categorical code and use the string value as label. It creates one variable taking on values 1, 2, ::: for the groups formed by varlist. You would just use the or/and operators, depending on whether you want any of those multiple strings to figure, or all of them to figure in the string variable: Code: replace var = x if ustrpos(name, "xxxxxxxxxxxxxx")>0 | ustrpos(name, "yyyyyyyyyyyyyy")>0 | ustrpos(name, I want to generate a dummy variable var2 equal to 1 if var1 . 1 word() Here I exploit the fact that strpos() returns a positive result, equivalent to true, if it finds a string within another string. (in that > order) and > > the y-axis would be the frequency of those values. See help string functions in Stata 14 for documentation of strrpos(). Compare this method to the generate method:. { quietly generate want = "" foreach c in Richland Sumter Forums for Discussing Stata; General; You are not logged in. StataJournal19: 246–259 Create new variable . 0. Modified 6 years, Instead use Stata's dataex command to generate example data to paste in your question using code blocks. Why Stata. I am fairly new at Stata and I need to create a variable that records the first instance of a combination of two variables (leader ID and year) and will allow it to hold the same value (1) for the duration of relationship. Regular expressions are a relatively easy, flexible method of searching strings. Complex strings may be very long and may contain binary information. Converting string variable to numerical when the data contains non-numeric characters Question I have very little experience with stata and have ran into this issue. let us suppose that main. In either cases, fndmtch2 or egen Frequently strings contain multiple pieces of information. sysuse auto, clear. Consider variable called date_string1. "String only I have a variable var1 that describes various situations in the form of long description. sysuse auto. destring var1, ignore(",") gen(var1_n) force The question is simple (yet I'm stupid enough not to get through): I have a string of words and i need stata to be able to recognize one of the words and drop all the observations where there's none. com split — Split string variables into parts within the string and then to generate one or more new string variables, each containing a part of the original. I have a list of drug codes that are considered antidepressants, but for each patient, these drug codes may show up in multiple variables across the dataset (because patients may And if the dataset is sorted by a variable -group-, and you type by group: gene wseqnum=_n then Stata will generate a new variable -wseqnum-, whose value is the sequential order of the observation within its group. Nonnumeric codes will also be considered in due course. For example, I need to change all instances of CC to 18, VC to 75, and PC to 35. 1 Description Thewordstringisshorthandforastringofcharacters. A complex string is a string that contains more than one piece of information. , $) require the word to be in a certain spot in the string(?) The 'inlist' function assigns 1 to the values in paranthesis, in this case: "WA"; and 0 for others. ignoreoptsmaybe aschars I have observations which list criminal codes as string variables, but not in the format I need. > In other words, we want to write; > replace The dummy variable notnumeric is defined such that it is 1 if a value contains a non-numeric character. 112 is no longer within the range inrange(,10,12) as it is 1, 2 etc. %PDF-1. the other variables contain open string answers and I want to generate x=1 if any answer for the variable is given. I have two columns of drug names as seen below “rxname” and “Product”. 6. 25 years old or less; and the last category contains If you have string variables, you can use egen’s group() function to recode them Stata - Generate a dummy variable if any string variable of a list begins with specific characters. 1. Fortunately, Stata offers some easy ways for converting string to numeric variables (and vice versa). dm43: Automatic recording of definitions. You can also examine those observations that have nonnumeric characters in them. variable displays as “male” and “female”, just as the underlying string variable sex would. For example, if we have a variable coded as “0” or “1”, but in a given observation, it was coded by mistake as I want to generate a variable x including several conditions. The first line of syntax reads in the dataset shown above. For example, var1 has values of apc apc apc apc, and var2 has values of apc or var1 is apc fra nya and var2 is apc. Assigning value labels in Stata. The destring command will only work if the string variable we are trying to convert to numeric contains no non-numeric characters. Extra spaces that go beyond our need are harmless, because " 1 " , in which “1” has two spaces before it and two after it, is treated the same way as " 1 " , in which “1” has destring—Convertstringvariablestonumericvariablesandviceversa3 ignore(”chars”[,ignoreopts])specifiesnonnumericcharactersberemoved. Stata would not find this confusing (though you might) because x in quotes ("x") To clarify, "ignoring missing variables" means that even if any one of the component variables is not missing, then apply the function to only that variable and produce a value for the new variable. 1 treatmentAsprinLT75 1 treatmentAspirin 1 treatmentAspirinGT200 0 etc. string2)" ) which will give you variable displays as “male” and “female”, just as the underlying string variable sex would. Notice: On April , I'm trying to run a conditional "drop" statement based on multiple values in a string variable. 7. 112", 10. The commands vary somewhat based on the format in which the data were entered and how consistently that format was applied. There are two methods to change string variables to numeric variable in Stata. This would be convenient for, e. The strings are things like "1000. dta contains observations and an identifier variable id, In my Stata data set, what I want to do is create a new variable (abor_rest), and assign the value of abor_rest from my excel file to my Stata data. We want to remove all of these characters and create new variables for date, price, and percent containing numeric values. anymatch() in Stata 9 and later releases is a replacement for eqany() in Stata 8 and prior releases. e. gen car_space2 = (headroom+length)/2 where if any of the variables has missing values, generate will ignore the entire rows and return missing values. String values always go in quotes, so if you wanted to store the letter x in a variable called x you’d say gen x = "x". Answer: take out the space between regexm and (diagnosis, "pneumonia"). > but I want to check if xyz or a certain phrase appears in the cell or not. I tried the following command: drop if ACTION_NAME == "topic-viewed” | “organizer-viewed” | “discussion-home-viewed” | “assignments-listed” | “Web-Links-home I think this is about finding observations (rows, in spreadsheet jargon) with a value (not a name) within one or more variables. In Stata, there are three functions that use regular expressions. generate—Createorchangecontentsofvariable Description Quickstart Menu Syntax Options Remarksandexamples References Alsosee Description generatecreatesanewvariable 6[GSW] 11 Creating new variables generate with string variables Stata is smart. Note that real()/string() are functions and must be used in conjunction with a Stata command. In your example, all cases begin with the string input, so this would work: I am trying to compare a string variable with several others for similarity: The goal is to compare variable "investor_name" to the company names listed in variables firm1 – firm3. xi: logistic outcome weight bp i. Each observation in my data represents a respondent. These variables were accidentally read into Stata as string variables because they contain spaces, dollar signs, commas, and percent signs. I would like to flag the rows with a superscript. Tabulating its values usually helps to identify why a destring did not work. Using tabulate to create dummy variables. Then you need not -decode- at all. Like so: Orginal Variable CC547A1 | VC549F| PC5297 New Variable 18547A1 | 75549F | 355297 Now that we have talked a bit about regular-expression syntax, let’s see some examples of expressions to match some common strings. a specific character) in a string. * Example generated by -dataex-. Further, how to count the number of charac The attached example dataset contains 14 rows of a single string variable called Year. In Stata, string variables are easily identifiable when you open the data browser or run codebook commands. How to generate a dummy variable in Stata based on a sub-string of an existing string variable? I am trying to create a new variable "apple" that only includes observations from var fruit="APPLE" (and as such, exclude "REAPPLE. So we can extract the date1 variable in only one line of code. One difference is that string values go in quotes; another is that for a string variable missing is "", i. e, I150 I want to generate 3 new variables satisfying each of three new condition: Another alternative is to refer to the label's name as well as the string's contents. Stata can store strings up to 2-billion characters Our dataset contains the variables date, price, and percent. Change variable value based on what a string contains. 1997. ds—Compactlylistvariableswithspecifiedproperties Description Quickstart Menu Syntax Options Remarksandexamples Storedresults Acknowledgments Alsosee Description 23. j. I want to create a new variable that is yes/no based on whether another variable contains a string variable. This means only missing values do not apply to this condition. That kind of variable is difficult to work with in Stata since, when used in any boolean expression, Stata treats missing value as true. Create New, or Modify Existing, Variables: Commands generate/replace and egen. cox@durham. Even though Stata can handle string variables, it is clear in many respects that numeric variables are much preferred. We (wisely) told Stata to generate the new variable agecat as a byte, thus conserving memory. I would like to generate some dummy variables, that, for example, =1 if the word "assault" is in the string variable. Dear all, Suppose we have string variable Y, and we would like to replace variable X when variable Y contains certain characters such as "Dec". 2013. ) finding a string if and only if it is a word is not too difficult from first principles. uk> Prev by Date: st: RE: handling the quote character stored in a string variable; Next by Date: Re: st: handling the quote character stored in a string variable; Previous by thread: st: RE: handling the quote character stored in a string variable So, to be fully general, we need the code to remove " DEAD" when it appears at the end of the string, and, I presume, if a string contains DEAD both at the end and somewhere else, it should remove only the one at the end. It appears to be dropping most of the cases for "Fathers". More > specifically, if the firm name contains certain Once that is accomplished, I would like to only keep the same strings within variable values. Not least, most statistical procedures just do not accept string variables. Weesie, J. 112 into 1 with label "10. gen found = 0 foreach v of var I* { replace found = (`v' == "R45851") if !found } list if found If the varlist (here I*) contains numeric variables, filter first, or put capture in front of the replace. EXAMPLE: Example 1: A researcher has addresses as a string variable and wants to create a new variable that contains just the zip codes. var2 as the following: The description tells us that the variable height is measured in centimeters (cm) and the variable weight is measured in kilograms (kg). Dear Statalist, Is it possible to create a string variable containing only the character " ? Stata 8 won't let me do so with the command gen quote = """ or in the data editor. See [U] 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. replace x = 5 if price == 4099 & price == 4749 I am not well versed in Stata, and I am struggling to find the right syntax to generate a new variable based on the properties of several other variables. Stata Technical Bulletin 35: substr() may be used with text or binary strings. Here is an illustrative example, and variable position is the one I am trying to get to: Regular expressions in Stata Introduction. The first argument may be a variable name, in which case the remaining arguments will be a list of values, or it may be a value, in which case the remaining arguments are variables. They can contain anything from letters, numbers, and spaces to other special characters. See [U] In a survey dataset I have a string variable (type: str244) with qualitative responses. With string variables, Stata has only one definition of missing, namely that a string is empty, and contains precisely no characters. To create new variables (typically from other variables in your data set, plus some arithmetic or logical expressions), or to modify variables that already exist in your data set, Stata provides two versions of basically the same procedures: Command generate is used if a new variable is to Change variable value based on what a string contains. Hence If I have a string variable containing observation "123,456" and then apply destring command, STATA creates a new variable which has observation 123 for the particular I have a dataset that contains information on 28 different drugs (variables drug1-drug28) and their positivity levels, but these are string variables currently. To install: ssc install dataex clear input str33 text "Book your tickets now" "Swiss is making your journey easy" "Buy your holiday tickets now!" I want to generate 3 NEW variables using these variables in my data set: Ucod; 19 variables in series by this name: Record_2, Record_3. Stata was looking for a variable called Kriti and couldn't find one. “Male”and“Female Although the example dataset contains numeric identifiers for person, fatherm, and motherm, the code is general enough to apply to string identifiers as well. To create a Stata date variable, you’ll choose a time unit, convert the date to “number of that time unit that have passed since January 1, 1960”, and then apply the appropriate format. For example, any row which has year of 1962 and state as 1 (Alabama) will be designated as 5 for my new variable. Given the following dataset and commands: sysuse auto, clear generate x = . The problem. where is a strl in the following example: Because make contains both the make and the model of each car, and make never I have a set of European regions for many different years and I would like to create a variable which identifies each region based on the country it belongs. Using the egenmore I have already counted the number of words using nwords, but I cannot find the counterpart for counting characters. The expressions on the right side of the equals sign are not mathematical, but they follow similar rules. I have one dummy variable indicating sex (Sex_at_birth), and 3 dummy variables st: RE: handling the quote character stored in a string variable. , "1992") but in a few rows there is a superscript (e. If that is not in your version of Stata, you merely reverse the string, find the substring using the method you already know, and then reverse what you found. 2019. E. generate [newvar and a string variable is created if the result is a string. I have two string variables that differ on one character for each observation. We want to create a new variable with full name in the order of last name and then first name separated by comma. Converting dates entered as strings into numeric dates that can be used by Stata is relatively simple. , WA). > > Then I converted the variable to a numeric one and then the count > worked. I hope this helps. Doing this by family: covers the case in which a value of person is unique for a person within a family but may also be a identifier for another person in another family. Not sure what is wrong here. generate; replace. Hot Network Questions Meaning of "This work was supported by author own support" In Stata you can create new variables with generate and you can modify the values of an existing variable with replace and with recode. tabulate group you will see --- Tunga Kantarci <[email protected]> wrote: > I have a variable that has string values. Stata: Using if with value labels. see below for an example: Code: * Example generated by -dataex-. Regular expressions can be very effective in cleansing string data. asssume the label's name is countrylabel, Gen UKdum=1 if country=="United Kingdom":countrylabel More details can be String Variables. 5 %ÐÔÅØ 14 0 obj /Length 2479 /Filter /FlateDecode >> stream xÚ­ZYoÛH ~÷¯ ¼/ `uú>0À 3;› f »ñ[2 ´D;DxhI*žüû©>xªEË³Æ #ŠÝ]U]ÇW %PDF-1. VW Rabbit foreign 2. 24. There is a limit on how many string values you can supply. 5. generate informs us whenever it produces missing values. webuse genxmpl3. The variable does not contain nonnumeric characters. One or more spaces, despite usually conveying nothing to people, do not qualify as missing so far as Stata is concerned. There is also a system variable _N, containing the number of observations in the dataset, or in the by-group if -by varlist:- is If all the strings begin with a single letter, e. I've tried, for example, Code: 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 This latter > variable has a lot of missing values, which I would like to fill in to > the extent possible by using the firm name variable. erators, and functions. Let's use Stata's generate command to create a new variable for height measured in meters I would try method 3, but generate a new variable to see where exactly Stata thinks there are missing values and add the force option. a string that contains nothing. With either option, if any string variable contains nonnumeric characters not specified with ignore(), then no corresponding variable will be forced conversion. varlist may contain numeric variables, string variables, or a combination of the two. Stata: If statement with variable names. g, labeling variables with the values of another variable. Datasets may include one or more nonnumeric words bundled in a string variable. Stata is really set up to use boolean variables coded 0 for false and 1 for true. egen nb = group(b) which will generate a numeric variable nb that does not have value labels. One is using destring command and other is real() command. variables, macros). race would include indicator variables for the race group as well. If the using dataset contains the numeric variable, the combined dataset In this video, we discuss how to extract specific text from a string variable using substr and the word function. Some of these names contains a Nick [email protected] [email protected] > I need to create a dummy variable from a string variable that > contains > both numbers and letters. For example: > > 1 > 2 > 3 > 4c > 5c > 6c > > I need to create a dummy variable from this variable without > destringing > it. Such a variable could be used as part of a match-merge procedure to give a certain shape or structure to the resulting dataset. The gen and replace commands work with string variables too. /*will show which have nonnumeric*/ Use the generate() option rather than replace, and use force. How to create string variable referencing other string variables in Stata? 1. Using the date command you can fix this variable just by telling STATA what this string contains. Speaking Stata: How best to generate indi-cator or dummy variables. In the latter case, if the string variable contains values greater than 2,045 characters or contains values with a binary 0 (\0 the new limit be remembered and become the default setting when you invoke Stata. I have a string variable called text, which consists of whole sentences, where the names of some cities appear. com But Stata returns “observation contains nonnumeric characters; no replace” FIrst, you can use encode . 4 Complex strings A variable might contain strings because the data simply could not be coerced into being stored numerically. xi will expand both numeric and string categorical variables, so if you had a string variable race containing “white”, “black”, and “other”, typing. After creating the new variable, Stata informed us that nine missing values were generated. Record_20; Both of them have values in alphanumerical format in it, basically ICD codes i. Ask Question Asked 6 years, 1 month ago. 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 h if and in qualifiers. If the using dataset contains the string variable, the combined dataset will have numeric missing values for the appended data on this variable; the contents of the string variable in the using dataset are ignored. Is there a way to find any one of a set of characters using an excel formula. The separators could be, for example, spaces or other punctuation symbols, but they can in suppose that a string variable contains substrings bound in parentheses In fact, it is a good if not _necessary_ habit to develop if you want to compare local/global macros that contain string information since Stata will only compare the first 80/244 characters (maximum string length) if your macro variable contains more characters and you use the normal coding Dear all, I would like to destring string variable, which contains comma as a decimal separator . At the bottom of the page is an explanation of 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. If the using dataset contains the numeric variable, the combined dataset Frequently strings contain multiple pieces of information. I am trying in Stata to generate a variable called region_code, based on another existing variable region, Essentially, I want something that looks as follows: Country region region_code Change variable value based on what a string contains. The following command generates no new values of x and is incorrect:. I would also add the ignore option just in case it complains about commas being nonnumeric. g. Example 3 We can drastically reduce the size of our dataset by encoding strings and then discarding the underlying string variable. Stata would not find this confusing (though you might) because x in quotes ("x") I want to create a new variable, called antidepressant. A common use of regular expressions in general (not just Stata) is in matching Prev by Date: Re: st: Removing quotation marks in string variables; Next by Date: Re: st: Removing quotation marks in string variables; Previous by thread: Re: st: Removing quotation marks in string variables; Next by thread: Re: st: Removing quotation marks in string variables; Index(es): Date; Thread Stringfunctions 5 uchar(𝑛)Description: theUnicodecharactercorrespondingtoUnicodecodepoint𝑛oranemptystringif 𝑛isbeyondtheUnicodecode-pointrange String Variables. replace diagnosis = "Pneumonia" if diagnosis == "pneumonia" which achieves the same result, or if you want to do this more generally you can write Using strpos may be tedious because you have to take capitalization into account, so I would use regular expressions. Thank you in advance! So for example, newvar1 aspirin 1 notSpecified 0 . The second argument is a string called a mask that tells the function what date/time components the string contains and in what order. I would like to create a simple bar graph that shows the > > frequency of observations and have it sorted by numeric value. How can I create a string variable stateString that would have string values without all those numeric values? gen I have several variables of the form: 1 gdppercap 2 19786,97 3 20713,737 4 20793,163 5 23070,398 6 5639,175 I have copy-pasted the data into Stata, and it thinks they are strings. list make foreign make foreign 1. The i. Stata Replacing Part of String. When I try to destring the variable with: destring Age, replace It gives: Age: contains nonnumeric characters; no replace The variables with these observations are > string-type variables > > in STATA. How to split a string in one variable to create two variables? 1. , generate() label() to get a numeric variable for xtset. If the first Read this as generate the new variable OK that is 1 (true) if id is equal to any of the values specified and 0 otherwise. In this section we will see how to compute variables with generate and replace. Keep if variable contains string, then keep only that string 12 Jun 2020, 17:07. If you type keep if facility==bir then Stata will look for a string variable named bir, and will complain if it doesn't find it. Ramani Gunatilaka asked > I have two numerical variables, -province- and -city-: > -province- has two digits, -city- has at least 4. However, when I try to generate a dummy variable, the 'inlist' function does not recognize the nominal value (e. If your variable contains string values longer than 32,000 bytes, then only the first We can create a real string variable from this numerically encoded variable by using decode:. See the storage type column in front of each variable. The approach you tried here would have been better with I have a variable state that takes integer values from 11 to 99. describe Contains data obs: If you have more than 67,784 unique values of the string variables that you are encoding, encode will complain. Here are the 2 variables tabulated: Partners highest ed qualification | In this example neither variable contains missing values. szlrqsx zwlg njxjhgf ymhbrr ntqz ybr hidpn qoupc zqpudx cacs