Stata subinstr I want to trim the leading double quote using - subinstr () - function. The second and third arguments of Manipulating string variables - subinstr 12 Oct 2017, 10:16 Hi, I have a string variable "household ID" that links members of polygamous households. Then, I need to generate a set of variables that would correspond to the the separator for or. input str12 x x 1. They can include both strings you wish to match exactly, and more flexible descriptions of what to look for. On Fri, Mar 23, 2012 These suggestions answer the very useful questions (a) How does one address a character code in Stata and (b) what is the Stata character code for a backtick? Unfortunately, Dear all I want to substitute every second character of a string (e. To the best of Thanks Reese. Stata has a function, subinstr(), that looks for occurrences of substrings within strings and replaces them with a specified substring (often just an empty string, ""). gen str12 y = subinstr (x," ","",. Both of these functions are variadic. All occur-rences are changed if cnt contains missing. com> Re: st: subinstr and special characters ? and * From: Eric Remarks and examples An invalid UTF-8 sequence in s, old, or new is replaced with the Unicode replacement character \ufffd before replacement is performed. t Description usubstr(s, tosub, pos) substitutes tosub into s at Unicode character position pos. The first byte position of s is pos = 1. In the imported dataset, each I ended up using the - subinstr - function to replace ASCII codes 10 and 13 by spaces after reading in the data, and parsing the result (as Nick suggests) by ignoring the References: st: subinstr " From: Paolo Grillo < [email protected]> st: subinstr " From: Paolo Grillo < [email protected]> From: Paolo Grillo < [email protected] > Prev by Date: RE: st: xtlogit is Thank you Nick. Frank -----Original Message----- From: [email protected] [mailto: [email The three code attempts you show in #1 all fail because -subinstr ()- does not have the ability to interpret wildcards or regular expressions. I am a beginer in stata programming although my little background in C++ and BASIC programming has helped me a lot to understand and learn Stata subinstr函数 stata-subinstr函数 stata举个例子，假设有一个变量country，它的取值为'China, Japan, Korea, Taiwan'，现在我们想把其中的'Japan'替换为'Malaysia'，则可以使用如下代码： Follow-Ups: RE: st: destring ignores more than what specified in ignore () From: Nick Cox <n. The subinstr () function requires four arguments. com I The function -subinstr ()- appears to work: . 15% 2 374 798 807. 69 32. Unfortunately, individual hyphens, and names starting with hyphens, are not being removed. 51 59. Beginning with Stata 14, Stata’s display en oding is UTF-8 on all platforms. I add some detailed comments: 1. ) /* note 2nd argument is space, 3rd is null string, 4th is a period, Use the advanced editing options to appropriately format quotes, data, code and Stata output. The other problem is that your local macros don't actually How do I modify an ado-file created for previous versions of Stata to support factor variables and the collinearity behavior introduced in Stata 11? replace tags = subinstr (tags, char (34), “”, . "123 456 789" 2. The code below demonstrates how to create a filename that is based on I am attempting to use the subinstr() command to remove hyphens in some names. The final string should look like this: ahuetlmltoing How do I remove leading or trailing zeros from string variables? subinstr () given the right arguments should work fine for your purpose. > > foreach var of varlist data* { > local newname = substr (`var', 5, . First, I create a macro that contains a list of all data files. Setting the Many raw data sets – survey as well as administrative data – contain string variables that need to be cleaned before they can be processed and For those using Stata, managing and cleaning string variables (text data) can initially seem challenging, but with several commands, it becomes a you might have problems removing the "â " and "¯" characters since they are extended ASCII characters. subinstr local mname ”from” ”to”, all does the same thing but changes all Description usubstr(s, n1, n2) returns the Unicode substring of s, starting at Unicode character n1, for a length of n2. For Description subinstr(s, old, new) returns s with all occurrences of old changed to new. 0 be modified to be %256. edu> Re: st: Re: string functions quotation marks From: Nick Cox >> You can eliminate substrings of length 1 if you wish using -subinstr()-. 前言 在目前工作中，用stata清洗及分析数据，感觉很顺滑。无奈不少同学因为help文件里的英文望而却步。 带着学习和分享的目的，根据工作经验，给大家整理一些常用以及不太常用但很 Remarks and examples An invalid UTF-8 sequence in s, old, or new is replaced with the Unicode replacement character \ufffd before replacement is performed. Hi, I've tried to run this code multiple times with many adjustments, I also tried the solutions to similar problems with the subinstr () invalid syntax, but these don't seem to work. Dear all, I have a dataset which contain id number with the display format is %6. For example: ID 10 Additionally, I have found that Stata is dropping the first letter of some names, even if that observation doesn't have any special characters within its name. html gen newvar My aim is to clean a given local from _ and all numbers following the underscore at the end of the words. ac. What might help to solve part of the problem are compound quotes, see: -help quotes- *------------ begin example ---------------- drop _all set obs 1 gen company = `""Hotel "ABC"""' di company If hyphens/minus-signs were allowed in variable names, Stata would have no way of knowing whether you are referring to one variable or a range of variables. 1 Tags: foreach, string, subinstr, variable label Robert Picard Join Date: Mar 2014 Posts: 1536 Dear Statalisters, I am facing two problems with text files that I imported into Stata. uk> Prev by Date: Re: st: tabulating with weights Next by Date: Re: st: tabulating with weights Previous by subinstr : : : global mname : : : , : : : count(fglobal j localg mname2) in addition to the usual, places a count of the number of substitutions in the specified global or in local macro mname2. Help with subinstr 05 Aug 2020, 08:03 Hi, I need help removing " ' " from some observations from one variable 'ccccccc 'errrrrrrr 'rtrtrtyy Tags: None 0 0 升级成为会员 « 上一篇： STATA:随机点名 » 下一篇： STATA:SPLIT分隔变量建立以固定字符开头的一批变量 posted @ 2023-03-08 07:56 myrj 阅读 (454) 评论 (0) 收藏 举报 Follow-Ups: Re: st: Removing quotation marks in string variables From: Nick Cox <njcoxstata@gmail. Use subinstr() if Some additional trickery would be necessary if "A" can appear anywhere in the string. 00% Dear Stata users, I have a string variable that some values of it are leading by a double quote ("). While there is no formal standardization of the syntax for a Well, one problem is that local X is not comma delimited, whereas inlist () requires a comma-delimited argument list. Please note that it Re: st: Re: Macros and -subinstr- At least part of the problem here is the way you are checking the contents of the local macro files the -dir- macro command encloses the file names in * sandbox clear set obs 1 foreach v in varA varB varC { gen `v' = 42 } * core idea and verification unab wanted : var* local wanted : subinstr local wanted "var" "", all display DATA CLEANING ROUTINE FOR STRING VARIABLES Many raw data sets – survey as well as administrative data – contain string variables that need to be cleaned before they can be st: Re: removing characters from string-formatted variables mixed in with numeric-formatted variables Hi, use following replace var1 = subinstr(var1,`"""',"",10) This will replace " as empty 10 times in the variable var1. com> References: st: remove special characters from string From: Skipper Hello, I'm trying to extract dates (in mm/dd/yyyy format) that are my variables' labels. Using regex with subinstr to replace a pattern in variable name 16 Aug 2024, 11:42 Hi I have the following variables 1) abc_0 abc_1 abc_2 2) def_2 def_3 def_4 3) ghi_00 ghi_1 I am working with a variable which is basically URLs. . The files consist of statements made different speakers. You have to see this the way that Stata sees this; then everything is crystal String course = Bachelor of Commerce - AD - Accounting-Maj; if you want to get subString of before '-' character use below line String requiredSubString = course. loumiotis@gmail. Let's identify the confusions: 1. #delimit; foreach VAR of varlist intensity* {; local NEW = We would like to show you a description here but the site won’t allow us. replace code = subinstr (code, "-", "", . Easy to use. com> Re: st: Removing quotation marks in string variables From: John Hi everyone, I would like to ask a question about character-based replacement. com https://yahoo. Same as in Stata ? matches zero or one instance matches zero or more instances matches one or more instances Since variable names don't have spaces, you could change the extended_fcn -subinstr- from > local show : subinstr local stuff "`i'" "" to > local show : subinstr local stuff "`i' " "" where a space Description substr(s, tosub, pos) substitutes tosub into s at byte position pos. com https://www. 3f. References: Re: st: destring command From: "Seed, Paul" <paul. 6. Again the string variable looks like this: "world bank,un,european This page shows examples of how one might use string related commands in STATA. . usubstr() may be used with text or binary strings. And I would like to use substring command to create a new variable take the Learn how to work with string variable i. com An invalid UTF-8 sequence in s, old, or new is replaced with the Unicode replacement character \ufffd before replacement is performed. Diagnostics subinstr(s, old, new, cnt) and subinword(s, old, new, cnt) treat cnt < 0 as if cnt = 0 was specified; the original string s is returned. [0-9]* [%-]+) ( Stata professionals are available to review the Stata content of book proposals, re-view Stata code and ensure output is efficient and reflects modern usage, provide advice about for What you should do is use the correct syntax. , gen newvar = subinstr (oldvar,"dis","reg",. We will focus on using the substr (), strlen (), and subinstr () commands. 1 subinstr () subinstr () takes four References: st: subinstr and special characters ? and * From: A Loumiotis <antonis. Assume that I have underscores followed by numbers at the end of the I want to rename variable names starting with intensity. you can try using the 3rd party "charlist" command (written by Stata guru Nick However, something weird is going on here given that some accents prevail while others are replaced by letters with no accents, as I wanted (see the examples below, in green I need to generate all possible tuples of the integer numbers 1,2,3,4 (with exactly 2 items in each tuple). Use the -subinstr()- extended macro substitution to replace the characters that may not occur in the query. ) Nick [email protected] Mosca, Ilaria > I have a string yed an invalid character symbol. Search Stata's datetime for more. On that occasion: It would be helpful if -subinstr (s1,s2,s3,n)- would allow negative Stata Name Functions Stata offers several functions for generating a safe name, as for use in generating variables or macros. Here are two interactive examples, and the principles are the same for string variables. Note a common element here: string functions, documented in [D] functions, are In Stata 13 and later versions, this can be done in one line using the built-in command rename. Sergiy has already given you one solution: as I mentioned, reversing the string first 人大经济论坛 › 论坛 › 计量经济学与统计论坛 五区 › 计量经济学与统计软件 › Stata专版 › subinstr 同时替换多个字符串 The -subinstr ()- function, for some reason, seems to handle this the way you expect. However, Warning: If you have more than 67,784 unique values of the string variables that you are encoding, encode will complain. If n1 < 0, n1 is interpreted as the distance from the last Unicode character of replace hhid = subinstr (hhid, " ", "", . If it offers an easy and correct solution, go for it. References: st: Re: string functions quotation marks From: "Eric Uslaner" <euslaner@gvpt. ) In the last two cases, subinstr() is a useful function for making changes toward consistent conventions. I used chartab from SSC, but some of special characters remained there. subinstr () subinstr () takes four arguments: a string to I have observations which list criminal codes as string variables, but not in the format I need. Code: foreach i of numlist 1/10 { clonevar chimiomol`i'=hc_chimiomol`i' replace Eric's code should crack the problem nicely. local xyz a b c d e f g a b c d e local a a b c local b: No need to use the subinstr () function to change the value of the macro in this way: just overwrite it. It is now clear that destring creates Hello! I understand that subinstr can be used to replace a substring in a column https://www. Note that any Unicode char-acter Stata has a function, subinstr(), that looks for occurrences of substrings within strings and replaces them with a specified substring (often just an empty string, ""). Dear Statalist, i have a problem with the implementation of the regular expressions in stata; i try to match (actually replace) one ore more single double quotes (") nested within a string variable Kind regards, Konrad Version: Stata/IC 13. cards_hh is a multiple-choice question and A, B, and C are names of different cards. ds, has (type numeric) local r (varlist) : subinstr local r (varlist) >>>>>>> end >>>>>>> >>>>>>> >>>>>>> >>>>>>> **regexm example == easier to use -split- initially >>>>>>> g example = regexs (0) /// >>>>>>> if regexm (j, " ( ( [0-9]+\. Then I try to exlude one or more files from the list. One merely has to specify the relevant rules, which can include wildcard It seems to me that you want to remove the last 5 characters. I am a beginer in stata programming although my little background in C++ and BASIC programming has helped me a lot to understand and learn Stata This video shows the application of String commands in Stata. I tried to use the subinstr function to extract the month strrpos () is part of the built-in official code in Stata 14 and cannot be installed from anywhere. cox@durham. uk> References: st: destring ignores more than what specified in ignore The specificiation "DMY" lets Stata know the data is in day-month-year format, but you can do MDY and many other formats. Delete partial contents of a Regular expressions use a notation system that allows for matching complex patterns of text with minimal effort. While there is no Though Stata doesn’t give any error, we are not able to successfully convert the string variables into numeric form due to the **字符串的替换 *命令 subinstr (S1,S2,S3,n),n表示迭代的次数，S1是变量，S2是需要替代的变量，S3是新替换的变量。如果N是. local a : variable label `i' local a: subinstr local a "’" "'" label var `i' "`a'" } On Fri, Apr 9, 2010 at 11:49 AM, Anna Reimondos <areimondos@gmail. You are missing the fourth argument, which is the number of occurrences (counting from the beginning of the string) to be String Cleaning Often strings need to be cleaned up before they are used, such as standardizing abbreviations or correcting misspellings. cleaning a string variables with extra spaces, extracting specific information or modifying it. Thanks Why does this code not work to remove X from the list? The variable is still in the list. This lecture series is intended for economics, management The function, subinstr (), (or regular expression functions) will do it. This approach worked resonablely well previously w. More paranoid code would do this replace company_name = reverse (subinstr (reverse (company_name), ". com/statalist/archive/2005-09/msg00386. If anyone has any subinstr(s, old, new, cnt) returns s with the first cnt occurrences of old changed to new. The first position of s is pos = 1. Stata is a complete, integrated statistical software package for statistics, visualization, data manipulation, and Hi, I'm having a really hard time using regex commands to remove commas and periods from a set of string. 代表所有的都换* gen riqi=subinstr (Reptdt,"-","",. I've come up with some alternate solutions (yours may work as well), but my main question deals with the failure usubinstr( subinstr() is intended for use only with plain ASCII characters and for use by pro-grammers who want to perform byte-based substitution. ) > rename `var' `newname' > } > > Another Note another key to success here: using the local macro function -subinstr-, rather than the -gen- function -subinstr ()-. 0? 2. Yes, I meant to refer to city, not hs_address. 15% 444 630 789. 3 String Cleaning Often strings need to be cleaned up before they are used, such as standardizing abbreviations or correcting misspellings. com> st: RE: remove special characters from string From: Nick Cox In Stata they are always enclosed in quotation marks. The first Unicode character position of s is pos = 1. Hello, I'm hoping someone can help me with this. ) via Econometrics by Simulation: Remove a subset from a global – Stata. If the second argument Your question contains your answer. E. Regular expressions use a notation system that allows for matching complex patterns of text with minimal effort. Fast. I am trying to remove special characters from the variable below: dataex issue_type "إثبات ملكية_x000d_منع معارضة واثبات ملكية_x000d_" I am looping 10 csv files (which are monthly data) and then trying to generate a month variable as a unique identifier. I want to use them to rename my variables (which are unhelpfully called v39-v41 at the If you are creating multiple datasets in Stata, you may wish to name them in an automated manner. The advanced options can be toggled on/off using the A button in the top right References: st: subinstr and special characters ? and * From: A Loumiotis <antonis. 3. After that, do your -destring- without any mention of the ` character. Without using the "subinstr" command How extract substring convert to uppercase convert to lowercase convert to proper case replace multiple, consecutive internal blanks with one blank remove leading blanks remove trailing subinstr local mname ”from” ”to” returns the contents of mname, with the first occurrence of “from” changed to “to”. google. you have to use `' sings and quotation. clear . These are the three functions that use regular expressions to perform matching. dtl", "dtl", 1)) and so forth to be sure of trapping only the first such string The most > crucial detail is the lack of an > equals sign to force evaluation. For example, let's say 本期主要命令字符串与数值类型（destring, tostring, substr, subinstr） 处理重复值（duplicates） 长宽格式转换（reshape） 分组计算（bysort The last sentence was too dogmatic. This will make end-of-pipe conversion Two questions, Nick: 1. Using subinstr to replace the third instance and beyond of a particular character (instead of the first n instances) 09 Dec 2021, 07:48 Hi, I have a string variable that should be Hello, I would like to replace 10 variables with bits of characters. Use subinstr() if your string I have a variable in Stata in my dataset that looks like this: city Washington city Boston city El Paso city Nashville-Davidson metropolitan government (balance) Lexington Follow-Ups: Re: st: RE: remove special characters from string From: Skipper Seabold <jsseabold@gmail. acustomstring) with a character from another string (hello). Use subinstr() if your string I have a large dataset of 5,000 observations and a subset of my data looks as follows: AandB 1 222 454 213. Regular expression is a method that allows for systematic searching, matching and replacing within My plan is to tell Stata that it should change "un" to "united nations" only if it comes as a stand-alone word. If that is the Hi All I have a dataset having two variables cards_hh and cards_other. ). I can't understand how your code arises from your explanation and in any case # within subinstr () could only Thank you guys for your help. g. The second Title stata. r. movies. div_unemp14 I would like to rename these variables to substr(s, tosub, pos) substitutes tosub into s at byte position pos. Is it possible to use your subinstr technique to find Description usubstr(s, tosub, pos) substitutes tosub into s at Unicode character position pos. end . 46 6. ) *collapsed the master data by hhid collapse (sum) agri_prod land_poss, by (hhid) *generated hhid_new so that i could compare the Remarks and examples If s contains “abcdef”, then substr(s, ”XY”, 2) changes s to contain “aXYdef”. 2. Cannot look up the exact commands at the moment but the second task can be done with the subinstr () command and the first with a combination of one of the regular expression We would like to show you a description here but the site won’t allow us. substr() may be used with text or binary strings. Hi everyone, I would like to know how to delete special characters in string variables. I received an invalid syntax, r(198) error, with the following code. However, you can do this with a simple regular expression. com substr( ) — Extract substring Syntax Description Conformability Description substr(s, tosub, pos) substitutes tosub into s at position pos. com> wrote: > Hello, > I am currently Hello, specialists, I encounter a weird problem when trying to removing spaces in string variables using subinstr function. umd. The char(128) function is an invalid UTF-8 sequence and t us will display a question I avoided this question the first time as I couldn't instantly see what was going on, but it yields to a little analysis. Thank you guys for your help. -subinstr ()- needs four arguments, not three. We can use command "subinstr" to replace a fixed string "s1" in Remarks and examples stata. It features an option - locale ("locale") - which enables Stata to import the source data in the correct encoding straight away. You can use the subinstr () function on the fly but the form above using equivalent syntax is easier when you're learning. -subinstr- can be fine for some problems with varlists. j. It's possible that the highest size integer 256, not 20. Using Stata 12, I want to replace some substrings in a string variable. com> Prev by Date: st: subinstr and special characters ? and * Next By NOT using the "split" command, how can I use "subinstr" or related commands to drop "\xxx" in each observation. So observations include values like for example www. The Unicode regular expression functions introduced in Stata 14 have a much more powerful definition of regular expressions than the non-Unicode functions. Use subinstr, which you can do within one or more loops given enough structure. References: st: remove special characters from string From: Skipper Seabold <jsseabold@gmail. I have a set of variables, the names of which have the same prefix attached to unique two-digit years: div_unemp03 div_unemp04 . For example for Google: local search term `"`:subinstr local anything " " "+", all'"' I would like to automate the processing of some data files. I'm working with two 6-digit string variables and, from these, need to produce a third/final string variable. stata. Can the %20. The first column shows the code you would use, 1. seed@kcl. Accurate. As -subinstr()- can delete more than one occurrence at a time it is likely to be an answer to your question about Useful string functions in Stata (updated list) Most often when I search the internet for help on Stata, it is probably when I need to work with string variables (such as names). split("-")[0]; This can't be done using the macro parsing -subinstr- or similar functions because they don't allow for pattern matching. If you have not already, try looking at the entries in -help string functions- to learn about the various functions that would help with problems related to strings For this question, Description substr(s, b, l) returns the substring of ASCII string s starting at position b and continuing for a length of l characters. e. for N in num 1/100: g varN = runiform() //old school 1 line loop I recommend against recommending old commands Learn about Stata's pdf documentation including the methods and formulas and fully worked examples. It indeed wasn't clear to me that destring works with characters and not substrings (I should have looked at the ado file first). nzlckmhgvzfmawssarfsqoqdhzmpjlooqbuyzjsdprjfflfdbffltghcqwjcmkeiandgpccxjj