We can do so by just tweaking a bit of the codes in the previous example. However, it seems JavaScript is either disabled or not supported by your browser. assuming, of course, that there are no other variables matching the pattern for which you do not want to report a frequency table. egen group = group (varname) This maps the distinct values of varname to 1, 2, 3, up to the number of distinct values. Here's Example 2 redone using a while loop. A little bit of Stata programming goes a long way Working Papers in Economics, 69. Consider the same temperature dataset we created, suppose we would like to generate twelve dummy variables (warm1-warm12) to reflect if each of the monthly average temperature is higher than the one in . Stata recognizes the period, "." as missing data. Stata loop over observations with years as string variables The open brace has to be on the same line as the foreach, and the close brace must be on a line by itself. Stack Overflow for Teams is moving to its own domain! But for many more variables. display `counter'. Two commands in o cial Stata, foreach and forvalues, provide structures for looping through lists of values (variable names, numbers, arbitrary text) and repeating commands using members of those lists in . I need to test multiple lights that turn on individually using a single switch. How do I loop over part of a variable name? %PDF-1.4 Speaking Stata: Loops, again and again Nicholas J. Cox Department of Geography Durham University Durham, UK n.j.cox@durham.ac.uk Abstract. I want to avoid using a complicated foreach loop. Login or. Consider the same temperature dataset we created, suppose we would like to generate twelve dummy variables (warm1-warm12) to reflect if each of the monthly average temperature is higher than the one in the previous year. } apply to documents without the need to be rewritten? I am trying to write a loop to generate and fill in a dummy variable for whether an individual was a member of a particular party in the year in question. What types of languages allow programmatic creation of variable names? From: Benjamin Volland <volland@econ.mpg.de> Prev by Date: st: using "tobexog" with panel data; Next by Date: Re: st: Econometrics Using Stata Online Course; Previous by thread: Re: st: foreach loop over all variables I need to use a local macro to loop over part of a variable name in Stata. Define local macro mcode and month, then rename the 12 vars in the foreach loop. Stata will not recognize the entire variable name. In the following codes, we tell Stata to do the same thing (the computation: c*9/5+32) for each of the variable in the varlist mtemp1 to mtemp12. However, I only need cases where all variables do not contain the value 1 if the determining variable is equal to 1 - H.Carolyne Oct 3, 2017 at 9:19 Thanks @svgrafov , let me check that again - H.Carolyne Oct 3, 2017 at 9:21 Add a comment 1 Answer MIT, Apache, GNU, etc.) To make Stata loop over these year values, we can use the levelsof command. Again, we will rename them as fmtempjan-fmtempdec. Using loop in Stata | The Data Hall The -local- command is a way of defining macro in Stata. Is there any way this can be done just using the simple macro? Light bulb as limit, to what is current limited to? They are explained and compared in some detail with a variety of examples. Stata | FAQ: Making foreach go through all values of a variable You can loop over parallel lists in Stata using the forvalues command and the extended macro function : word #. Making statements based on opinion; back them up with references or personal experience. Looping over variables with wildcards in local macros Basically i have a list of 28 variables with the suffix "_bas" that act as baseline and 28 variables with the suffix "-ex". foreach var of varlist inc1-inc12 { generate tax`var' = `var' * .10 } Re: st: foreach loop over all variables - Stata For example, let us say that you had two lists, cat dog cow pig and meow woof moo oinkoink. I want to use a foreach loop to execute commands over two lists of variables at once. 12 0 obj -forvalues-: loop over consecutive values The -forvalues- command is another command that gets to be used a lot in handling repetitive works. Macros are not used to loop over the elements of the . You can make Stata try all those values and trap cases when there is no output. For example, continuing with the code above: The wildcard ? Also note the difference between. This command is able to provide a list of unique values for a variable. stata - How to use foreach loop over two variables at once? - Stack foreach var of varlist pri-rep t* . My question can best be explained with an example: Example: In my loop, I want refer to variables both for a given year and for the year two years prior. r/stata - Need a loop for a series of variables but don't know how to capture noisily whatever if nchildren == `i' . A Stata macro can contain multiple elements; it has a name and contents. Removing repeating rows and columns from 2d array, Position where neither player can force an *exact* outcome. In particular, note that the structure employed above may not even be required due to Stata's varlist structure (see help varlist). Your request is a bit confusing. Stata won't recognize the entire variable name simply because you have passed the entire local to the command: To be clear, the result I want is the following: tab lod_mep_BL tab lod_mibp_BL tab lod_mbp_BL, Nice answer. R: How to loop over variable names using number indexes (like in Stata Loop over different files in a folder, modify them, and append the R equivalent of Stata's for-loop over local macro list of stubnames, Looping over variables with wildcards in local macros. . su group, meanonly Among other things, this second step leaves behind in r (max) the number of distinct values; see [R] summarize for details on saved results. PDF Title stata.com foreach Loop over items /Length 2258 We can do this by running the following codes, then repeat them for twelve times to create the twelve variables warm1-warm12. Here we rename them back to fmtemp1-fmtemp12. I usually run -display- to see how the macro looks like before actually applying the defined macro on tasks like changing variable names, just to make sure I dont accidentally change them to some undesired results or even cause errors; however the display line is not necessary in this case. How do I use a local macro referencing a variable? It looks like the following. Cox, N. J. Unless you are doing something for which a Stata command does not already exist, it is entirely possible to use Stata without ever coding a loop. Working across variables using foreach | Stata Learning Modules takes the place of one character. while The -forvalues- command is another command that gets to be used a lot in handling repetitive works. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Yun Tai According to your answer, I have tried: 1) I collect all files of my folder, and I do not spell out the .dta in my loop. Stata Loop using variables - Statalist Stata Loop using variables 13 Dec 2021, 11:13. Comment. Storing a numerical variable in a local macro? . Using Loops to Define Missing Data Codes Time for one more example. In the example below we use the foreach command to cycle through the variables inc1 to inc12 and compute the taxable income as taxinc1 - taxinc12. Kind regards, Carlo (Stata 17.0 SE) Nick Cox Join Date: Mar 2014 Posts: 29223 #3 19 Apr 2016, 01:40 You must loop over two lists at once. Oct 3, 2017 at 9:14 This loop returns all the variables that do not contain 1 in the set of variables. Code: local files: dir "C:\Users\Desktop\Stata\Datos" files "*." foreach file in `files' { use `file', clear keep var1 var2 var3 save `file'a, replace append using `file'a save List1.dta, replace erase `file'a } For example, in the first iteration of my loop, I'd hope to refer to variables for a given year (2000), and for the year two years prior to that year (1998). Stata | FAQ: Making foreach go through all values of a variable X1 X2 X3 AR, 1972-1981 PDC, 1982-1986 PFL, 1986-. JavaScript must be enabled in order for you to use our website. python requests send file Help -varlist- provides the following: "Many commands understand the keyword _all to mean all variables" so this also works: sysuse auto.dta foreach var of varlist _all { summ `var' } Tim On Thu, Feb 23, 2012 at 4:31 AM, Seliger Florian <seliger@kof.ethz.ch> wrote: > Dear Statalist, > > Maybe that's a . Can FOSS software licenses (e.g. We can obtain the same results in a slightly different way. Example 3: Looping over existing variables. Not the answer you're looking for? CLIR Postdoctoral Fellow local N = _N See help foreach for the syntax of foreach. % Stata Journal 20: 999-1015.. 2021a.Erratum: Speaking Stata: Loops, again and again. local counter = 0 local N = _N forvalues i = 1 / `N' { local counter = `counter' + 1 } display `counter' Note: this is exactly what's done by the count command. Post . . Here we introduce another command -local-, which is utilized a lot with commands like foreach to deal with repetitive tasks that are more complex. Hello everyone, . Why was video, audio and picture compression the poorest when storage space was the costliest? Research Guides: Loops in Stata: Conducting Repetitive Tasks Alternatively, we can use the -foreach- command to achieve the same goal. Stata Basics: foreach and forvalues - University of Virginia You loop over the old names, but offer all the new names as a group each time. Example 1 - Load the following dataset use https://dss.princeton.edu/training/loop-foreach.dta - Suppose we want to convert some of the variables in the dataset into log form. display `counter', https://libguides.library.nd.edu/data-analysis-stata. Why does sending via a UdpClient cause subsequent receiving to fail? Stata continues to do this until all variables have been used. This guide discusses the two most common loop techniques available in Stata. You can browse but not post. Method 3. Upon further reflection (sometimes the structure of the question anchors a certain method, when an alternative approach is more straightforward), searching the help files for information on the tabulate command (help tabulate) will direct you to the following syntax: tab1 varlist [if] [in] [weight] [, tab1_options], Given the discussion above about the use of varlists, you can simply code. stata - How do I loop over part of a variable name? - Stack Overflow However, if your variables are not as easily identifiable using the pattern matching allowed by varlist, a loop as in the first example is simple enough -- four very short lines of code. Basically i have a list of 28 variables with the suffix "_bas" that act as baseline and 28 variables with the suffix "-ex". I will code all the warm variables as 99 for the year of 2013, since they dont have references to compare in this case. Method 1 This three-step process always works. That being said, judicious use of loops can make life easier for you. su group, meanonly Among other things, this second step leaves behind in r (max) the number of distinct values; see [R] summarize for details on saved results. st: foreach loop over all variables. This code basically aims at calculating the growth rate of the "_ex" variables to then apply those growth rates to the last observation of the corresponding "_bas" variable. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 504), Mobile app infrastructure being decommissioned. 2. It is not uncommon to open up a data set and find the code for missing data to be "99" or "999" or some other number. Are witnesses allowed to give private testimonies? Substituting black beans for ground beef in a meat pie. Re: st: foreach loop over all variables. The utility of looping becomes more obvious if we suppose that you need to rename ALL the variables in this dataset.