WebThe rule is to calculate the number of any occurrences in the matched id (disregarding whether it is treated or not) within one year starting from the date of the treated observations. Example: The very first treated observation is matched with id 2. id 2 has two observations within the next year after February 1st, 2000. Webdrop if variable==1. rename time end. start end length. 4 6 3. 15 19 5. as your two event observations. If you need to keep information in the in-between time periods I would suggest mucking ...
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WebApr 21, 2016 · The codes below assume that the data is in Stata date format. If not, see help datetime. Code: gen year=year (date) bysort id year: egen mycount=count (year) if !mi (Price) Last edited by Carole J. Wilson; 19 Apr 2016, 21:41 . Reason: Corrected variable name count per Clyde's excellent reminder that the word count is reserved! WebJan 20, 2011 · Somebody asked how to count the number of occurrences of a string within a string. For example, if I have the following data, I want to generate new variables countSS, countSM, and countSG that contains the number of occurrences of "SS", "SM", or "SG" in variable awards. Here is one solution using the macro extended function -subinstr- (-help ...
WebIn that you could do one of these two things (and there are probably many more options): *----------- begin example -------------- sysuse auto, clear codebook make count if !missing (make) *------------ end example --------------- 2) You want to know how many observations have a specific string. WebAug 16, 2015 · The following works, however, I cannot add an if statement ds ID region, not // all variables in the dataset apart from ID region return list local varlist = r (varlist) egen count_of_1s = rowtotal (`varlist') If I change the last line with the one below, I get an error of invalid syntax. egen count_of_1s = rowtotal (`varlist') if `v' == 1
WebOct 13, 2024 · This would seem to require the following simple code: count if control_ == "." The observations in variable control are strings. When I run the above code, I get a "0," but when I browse the data, there are many missing values. I have also tried: count if control_ == " " What may be happening? stata Share Improve this question Follow Webit is probable that you need to use the command shown below: has (varlabel) for example: has (varlabel *npb*) would select variables with variable labels including the phrase “npb”. Cite. 5 ...
WebTo do this, you will need to set the seed. The seed is the number with which Stata (or any other program) starts its algorithm to generate the pseudo-random numbers. If you do not set the seed, Stata will start its algorithm with the seed 123456789. To set the seed, use the set seed command followed by a number.
WebA Comparison Between Some Methods of Analysis Count Data by Using R-packages 1 Faculty of Comp. and Math., Dept. of math , University of Kufa, Najaf ,Iraq 2 Al-Furat Al-Awsat Technical University, Najaf ,Iraq a) Corresponding author: [email protected] b) [email protected] Abstract. The Poisson … essential oils for ibs bloatingWebFeb 7, 2024 · Stata has two system variables that always exist as long as data is loaded, _n and _N. _n basically indexes observations (rows): _n = 1 is the first row, _n = 2 is the second, and so on. _N denotes the total number of rows. To illustrate, let’s use stocks.dta. This portfolio contains 32 observations. fippa section 49WebThe Stata Journal (2007) 7, Number 4, pp. 571–581 Speaking Stata: Counting groups, especially panels Nicholas J. Cox Department of Geography Durham University Durham City, UK [email protected] Abstract. Counting panels, and more generally groups, is sometimes possible in Stata through a reduction command (e.g., collapse, contract, … fip pageWebAug 15, 2015 · The following works, however, I cannot add an if statement ds ID region, not // all variables in the dataset apart from ID region return list local varlist = r (varlist) egen … fippa section 26WebThe code below creates a variable called nmis that gives the number of missing values for each observation. The function rmiss2() used here is an extension to the egen function rmiss(). It counts the number of missing values in the varlist. rmiss2() accepts both string and numeric variables. (Stata’s rmiss() only accepts fippa section 19Webjournals.sagepub.com fip pathogeneseWebMay 25, 2024 · The command egen newvar = count (stringVar), by (groups) does not work ( type mismatch r (109); ). Removing the by (groups) doesn't solve the issue: the problem … fippa section 32