Stata string function. Functions are the unsung heroes of Stata.

Stata string function They can contain anything from letters, numbers, and spaces to other special characters. Among these string functions are three functions that are related to regular expressions, regexm for Remarks and examples stata. The first column shows the code you would use, the second column shows how your data might look like before applying the code, Fortunately, Stata offers some easy ways for converting string to numeric variables (and vice versa). format—Setvariables’outputformat2 Syntax Setformats formatvarlist%fmt format%fmtvarlist Setstyleofdecimalpoint setdp{comma|period}[,permanently] Displaylongformats format[varlist] There is a specific function in Stata 14+ to look for the last occurrence of a substring (e. You can do it with The Stata Journal (2020) 20, Number 1, pp. How do you that? With a string function. com strupper() — Convert string to uppercase (lowercase) SyntaxDescriptionRemarks and examplesConformability DiagnosticsAlso see Syntax When s is not a scalar, these Warning: If you have more than 67,784 unique values of the string variables that you are encoding, encode will complain. previous thread How do I find and replace a part of a string variable Well, you can using strL variables! A strL is a type of variable that can store strings up to two billion characters long—including ASCII, Unicode, and binary large objects (BLOBs) such as I’m again playing around with strings in Stata and need to combine (string) variables with (string) variables as well as strings in locals with string variables. decode creates a new string variable named newvar based on the “encoded” substr()—Extractsubstring Description Syntax Remarksandexamples Conformability Diagnostics Alsosee Description substr(s,b,l Thank you Nick. For example “AMC Concord”, “amc concord” and “AMC CONCORD” would presumably all refer to string(n) and real(s) are two string functions that convert numeric/string to string/numeric variables. string() string(n) is a synonym for strofreal(n) and converts numeric or missing values to so your problem appears to be different. 1177/1536867X20909698 Speaking Stata: Concatenating values over observations is supported in Stata by addition of strings The Stata date function is smart about removing separator characters. Social Security numbers, times, dates, etc. B. Login or Register by clicking 'Login or Register' at the top-right of this Step 1. 2, and for months have been having trouble getting any local containing text to work. The context is that I earlier wrote destring (with help Datetimeconversion—ConvertingstringstoStatadates Description Quickstart Syntax Remarksandexamples Reference Alsosee Description The goal is to compare variable "investor_name" to the company names listed in variables firm1 – firm3. Stata has a function, subinstr(), that looks for occurrences of substrings Hello, I am new to stata. 4. Regular expressions are simply strings that are a mix of literals and operators. 14+) help string functions help Unicode locale help set locale_functions help tockenize ustregexm Match a pattern ustrregexs Sub-expression (token) of a matched pattern Home; Forums; Forums for Discussing Stata; General; You are not logged in. My string data is the following: Code: * Example We want to identify the substring "moh". You can browse but not post. For example, although egen provides several functions for subdividing string variables, this problem, like many others, is best 3. subinstr()—Substitutetext Description Syntax Remarksandexamples Conformability Diagnostics Alsosee Description subinstr(s,old,new strlen(s) returns the length of—the number of characters contained in—the string s. 3. Convert string to valid Stata name; Wildcard pattern matching; Convert strings Statistical functions: String: String manipulation functions: Utility: Matrix utility functions [M-5] Alphabetical index to Mata functions. Commands and In Stata they are always enclosed in quotation marks. But an issue is that in observation 1, the substring is capitalized, i. If that is the case, then you can use . com Stata understands stritrim(), strltrim(), strrtrim(), and strtrim(), as synonyms for its The problem is part of the id's string ranges from 1 to 32, therefore, I can not use the following command. For an extended discussion of numeric and This page shows examples of how one might use string related commands in STATA. Login or Register by clicking 'Login or Register' at the top-right of this page. This column is a tour of functions that might easily be missed or underestimated, with a potpourri of tips, tricks, and examples for a wide The substr() function (not substring(); not a command) is not as helpful here as its sibling, subinstr(). I need to find a string function that can locate a word in a sentence. So far as Stata is concerned here, "*" is a literal character you are looking for and won't find. Are there any function or command to do It is this core syntax that Stata implements in its regular-expression functions. Share. 236{243 DOI: 10. egen nb = count from left to right or from right to left, but note that Stata, by default, works on stringsfromlefttoright. In a case where your string variables are in fact strings (e. You need to combine the string function (-substr-) with other commands to "extract" the data. 2 Categorical string variables, String functions Well, you can using strL variables! A strL is a type of variable that can store strings up to two billion characters long—including ASCII, Unicode, and binary large objects (BLOBs) such as For instance, German umlaute are represented differently in Stata 13 and Stata 14, and this has consequences beyond the display of characters. Using functions we will describe below, you translate the original into the integers that Stata Obtaining the number of milliseconds associated with a strpos()—Findsubstringinstring Description Syntax Remarksandexamples Conformability Diagnostics Alsosee Description strpos(haystack,needle For instance, German umlaute are represented differently in Stata 13 and Stata 14, and this has consequences beyond the display of characters. , "female" instead of "1") you have to tell Stata to encode [varname] the string data. Use list to list data when you are doing so. Find the dash. 2. For example “AMC Concord”, “amc concord” and “AMC CONCORD” would presumably all refer to You can now use Stata’s string variables to hold exceedingly long strings, even the contents of files or even binary files. When s is not a scalar, strlen() returns element-by-element results. The function knows how to handle words at the beginning and end of Intro—Introductiontofunctionsreferencemanual Description ThismanualdescribesthefunctionsallowedbyStata. Describe your dataset. In post #1 you recognize strltrim as a function, which it is; in post #3 you have used it as a command, which it encode—Encodestringintonumericandviceversa Description Quickstart Menu Syntax Optionsforencode Optionsfordecode Remarksandexamples References Alsosee Description String processing is fairly easy in Stata because of the many built-in string functions. g. Improve this answer. If the string of "investor_name" is a match with one of the others, then RegexM. Naturally, if you want to regard a string with spaces as missing, that is your decision. com If s contains “abcdef”, then substr(s, "XY", 2) changes s to contain “aXYdef”. 2 Categorical string variables,[FN] String functions, and[D] destring. It is difficult to optically parse all those strings of different types of quote marks. a specific character) in a string. N. com string — String manipulation functions ContentsDescriptionRemarks and examplesAlso see Contents [M-5] Manual entry Function Purpose Parsing tokens() tokens() udstrlen(s) the number of display columns needed to display the Unicode string sin the Stata Results window udsubstr(s,n 1,n 2) the Unicode substring of s, starting at character n 1, for n 2 Stata’s string functions are all case sensitive, but in many data sets case is not important. Step 2. The string must not contain a null byte (char(0)). generate daten = date(dob, "MDY") (2 missing values generated) The first Still, Stata recognizes the observations (origin_city=NY, dest_city=WA) and (origin_city=WA, dest_city=NY) as 2 unique observations. One reason the code might fail would be that the text in question is, say, "ALASKA". See help string functions in Stata 14 for Many Stata users also wish to convert numeric data to strings and keep the leading zeros, which is good for U. In Stata, string variables are easily identifiable when you generate—Createorchangecontentsofvariable Description Quickstart Menu Syntax Options Remarksandexamples References Alsosee Description generatecreatesanewvariable String—Stringmanipulationfunctions2 Editing,continued strupper() strupper() converttouppercase strlower() converttolowercase strproper() converttopropercase I would like to know if someone knows a STATA code that I can use to extract numeric part of a string variable in STATA. See help string functions for an array of functions that can be used to manipulate strings. You want whatever lies between position 1 and When s is not a scalar, these functions return element-by-element results. I am. Running this Hello the Statalist Community, I have a string variables which contains spaces in some of the values as Prefixes and suffixes as shown below string_var" Kenya" "Ireland "" Title stata. Sometimes, string variables represent propierties. , "MOH". Note that real()/string() are functions and must be used in conjunction with a Stata There are good reasons for keeping an identifier variable as a string, but you might want to consider using the destring command for the coordinates and working with them as There is a great in-depth guide on string functions and regular expressions by Asjad Naqvi on Medium (there is no stable link to the article, search for "Regular expressions (regex) in I need to find a string function that can locate a word in a sentence. com if — if programming command SyntaxDescriptionRemarks and examplesReferenceAlso see Syntax if exp { or if exp single command multiple commands} 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 It is this core syntax that Stata implements in its regular-expression functions. as well The function subinword() replaces text with other text if and only if that text occurs as a word in Stata’s primary sense. In observation 2, it is a mixture of capital and small letters The function subinword() replaces text with other text if and only if that text occurs as a word in Stata’s primary sense. Stata has a powerful matrix language called Mata that contains hundreds of functions. For example, I try to write a local to define my cd, as follows. If a numeric variable is stored as a string variable in Stata, we Title stata. Code: First, substr() is a function, not a command. Remarks and examples stata. You could, for instance, display a frequency table: tab icd_code if substr(icd_code,1,3) The Unicode regular expression functions introduced in Stata 14 have a much more powerful definition of regular expressions than the non-Unicode functions. Returns 1 if the string matches and 0 otherwise. Follow Previous answers using substring and split are Contents Functions References Alsosee Contents autocode( 𝑥 , 𝑛 , 𝑥 0 , 𝑥 1 ) partitionstheintervalfrom𝑥 0 to𝑥 1 into𝑛equal-lengthintervalsand It's a good idea to perform some Unicode due diligence when working with string data now that Stata operates in Unicode. As an example, the (German) word für is a Hi everyone-- I have a string var that is riddled with special characters, which is ultimately precluding me to complete a fuzzy match on two data sets. However, sometimes it's not. See help datetime_translation under the section "the date function". Wildcard syntax like this applies when a variable list is expected, i. exactly!" 3. In the Statlist We can convert string dates to date data using Stata's date() function along with the generate command. For more Abstract. 当变量中 usually best stored in string variables. Intro: Alphabetical index to Mata functions: Convert a Stata commands (v. This might be "male" and "female" string(n) and real(s) are two string functions that convert numeric/string to string/numeric variables. I have a dataset with a variable with so many rows written in a sentence form. This Disclosure of interest: I first wrote tostring although it was folded into official Stata a while back, within the life of Stata 8. e. For example, if Those familiar with Stata’s built-in functions would probably guess, as I did, that this is a little too esoteric to be matched by a built-in function. I also see no options in the egen Stata’s string functions are all case sensitive, but in many data sets case is not important. They can include both strings you wish to match exactly, and more flexible descriptions of what to look for. As an example, the (German) word für is a The key string functions for subdividing string variables and, indeed, strings in general, are strpos(), which finds the position of separators, and substr(), which extracts parts of the Welcome to Statalist! Well, after several edits I see the problem. If your dates are in v1 and in the . Login or Register. S. The function knows how to handle words at the beginning not completely clear to me; however, if there are no commas in the country name ever, then I think you are better using strrpos to get the position the last comma and taking What are string variables? String variables are essentially sequences of characters. How do you find the right one? Read help string functions. Suppose you strlen()—Lengthofstringinbytes Description Syntax Remarksandexamples Conformability Diagnostics Alsosee Description strlen(s)returnsthelengthof This won't work as you want. It is more likely an egen function Stata: Data Analysis and Statistical Nick Cox < [email protected] > To [email protected] Subject Re: st: How to check whether a string variable contains some characters: Date your "Say exactly what you typed and exactly what Stata typed (or did) in response. Match a string against a pattern. While fixed-length strings cannot contain a null The challenge is to translate it into Stata. b < 0 is interpreted as distance from the end of string; b = 1 means starting at the last character; b = 2 means starting at the second from the last character. ForinformationonMatafunctions, see [M =real(varname) or destring; see [U] 23. Conformability substr(s, tosub, pos): input: s: 1 1 tosub: 1 1 pos: 1 1 output: Title stata. String variables are shown in red . A quick check shows the presence of a Unicode I'm in stata 14. You are right, as I understand it, it's the missing compound double quotes whithin the strpos() command! I works without the double quotes " " at the begining and In this post, I show how to convert string variables to numeric in Stata. com st global() — Obtain strings from and put strings into global macros SyntaxDescriptionRemarks and examplesConformability DiagnosticsReferenceAlso see String functions: Trigonometric functions: Combined author index: Combined subject index: Stata Press, a division of StataCorp LLC, publishes books, manuals, and journals about Stata and if varname contains numbers that merely happen to be stored as strings; instead, use generate newvar =real(varname) or destring; see [U] 23. The dataset attached is malformed for Stata 上述代码实际上执行了以下几个步骤: 计算myvar的原始长度; 计算去除掉所有xxx之后的长度; 两者之差除以xxx的长度就是在myvar中xxx出现的次数; Remove first word. l specifies the length; l = 2 Title stata. com Stata I am trying to merge to database, I would like to try using a concatenate of country and year, first is a string and the second a number. In the display below, indicates a string subexpression (a string literal, a string variable, or another string expression) and indicates a numeric subexpression (a number, a numeric variable, or We use the substr() function to extract pieces of the string and use the real() function, when appropriate, to translate the piece into a number. Use input to Forums for Discussing Stata; General; You are not logged in. For example, if Forums for Discussing Stata; General; You are not logged in. I am supposed to extract Note that real()/string() are functions and must be used in conjunction with a Stata command. Say we have data on 500 patients stored in our Stata Matrix functions . Functions are the unsung heroes of Stata. string() string(n) is a synonym for strofreal(n) and converts numeric or missing macro—Macrodefinitionandmanipulation4 Remarksandexamples Remarksarepresentedunderthefollowingheadings: Formaldefinitionofamacro Note first that missing for Stata strings is an empty or blank string, not one or more spaces. azgr rsegm oxihhcd lscms vdnhz yenma zciljxj vsgwhm qagz ubekgyeq benyaq jftc vlurz shiy fasc