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PDF Title stata.com foreach Loop over items Stack Overflow for Teams is moving to its own domain! Center for Digital Scholarship250F Hesburgh LibraryUniversity of Notre DameNotre Dame, IN 46556. Removing repeating rows and columns from 2d array, Position where neither player can force an *exact* outcome. Stata Loop using variables - Statalist Macros are not used to loop over the elements of the . 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. 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 Connect and share knowledge within a single location that is structured and easy to search. 503), Fighting to balance identity and anonymity on the web(3) (Ep. 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 Stata Loop using variables 13 Dec 2021, 11:13. 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. 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. You can loop over parallel lists in Stata using the forvalues command and the extended macro function : word #. local counter = `counter' + 1 Take the temperature dataset we created as an example. Stata continues to do this until all variables have been used. Here we rename them back to fmtemp1-fmtemp12. What's the proper way to extend wiring into a replacement panelboard? Your request is a bit confusing. However, you there are certainly more efficient ways to accomplish your goal. MIT, Apache, GNU, etc.) Now the mean temperatures of each month are in Centigrade, if we want to convert them to Fahrenheit, we could do the computation for the 12 variables. The following code partly solves the problem, is almost certainly wrong here. Instead, we can use -forvalues- to do so: Reference 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 . while python requests send file Another way to compute 12 variables representing the amount of tax paid (10%) for each month is to use the foreach command. . JavaScript must be enabled in order for you to use our website. Working across variables using foreach | Stata Learning Modules Loop over different files in a folder, modify them, and append the 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 . So unless you have variables named lod_mep, mibp and mbp_BL this will break (in fact, it breaks with tab regardless because there would be 3 variables). You could of course type the rename command as many times as you need (in this case it would be twice), but you can automate this task using a foreach loop: foreach v in price mpg { We can obtain the same results in a slightly different way. The following are the three types of loops in Stata. stream Method 1 What always works is this three-step process: . 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. local counter = 0 Using loop in Stata | The Data Hall animal behavior mod minecraft; spring security jwt 403 forbidden. apply to documents without the need to be rewritten? %PDF-1.4 The following example is a bit nonsensical (and given the structure, there are easier ways of going about this), but should convey the basic idea. >> When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. stata - Loop through a set of variables based on condition in another Thanks for contributing an answer to Stack Overflow! } Note: this is exactly what's done by the count command. There are times we need to do some repetitive tasks in the process of data preparation, analysis or presentation, for instance, computing a set of variables in a same manner, rename or create a series of variables, or repetitively recode values of a number of variables. It looks like the following. But for many more variables. First, this is precisely the purpose of a loop, and second, loops in Stata are (at the "introductory level") quite simple. . That being said, judicious use of loops can make life easier for you. Alternatively, we can use the -foreach- command to achieve the same goal. Stata | FAQ: Parallel list while `counter' < `N' { I don't understand the use of diodes in this diagram, Movie about scientist trying to find evidence of soul. stata - How do I loop over part of a variable name? - Stack Overflow Why was video, audio and picture compression the poorest when storage space was the costliest? My data is long with each observation being a person, year. . You can make Stata try all those values and trap cases when there is no output. 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. stata - Looping through every value - Stack Overflow Here's Example 2 redone using a while loop. The utility of looping becomes more obvious if we suppose that you need to rename ALL the variables in this dataset. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Here's one example that tags ids that switch doctors: ssc install egenmore bysort id: egen num_docs = nvals (doc) generate switcher2 = cond (num_docs>1,1,0) The underlying idea is the same. For example, I will code warm1 for the year of 2014 as 1 if the value of fmtemp1 for 2014 is higher than the value for 2013. display `counter'. 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). By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. local N = _N -forvalues-: loop over consecutive values The -forvalues- command is another command that gets to be used a lot in handling repetitive works. A Stata macro can contain multiple elements; it has a name and contents. Stata loop over observations with years as string variables To reiterate my problem, I don't want to go through all 37 values of j for each firmno. 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 . Is there any way this can be done just using the simple macro? 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. I will code all the warm variables as 99 for the year of 2013, since they dont have references to compare in this case. See help foreach for the syntax of foreach. }. Thanks! This was a rather simple repetitive task which can be handled solely by the foreach command. Making statements based on opinion; back them up with references or personal experience. Note when you call a defined macro, it has to be wrapped in ` (left tick) and (apostrophe) symbols. You can browse but not post. MD, 1966-1980 PMDB, 1980-1988 PSB, 1988-. Hello everyone, . /Filter /FlateDecode 2. Stata won't recognize the entire variable name simply because you have passed the entire local to the command: tab lod_mep mibp mbp_BL. foreach i of num 1/20 { . % Baum, C. (2005). From: "Seliger Florian" <seliger@kof.ethz.ch> Re: st: foreach loop over all variables. Define local macro mcode and month, then rename the 12 vars in the foreach loop. Consider this sample dataset of monthly average temperature for three years. I want to avoid using a complicated foreach loop. Its crucial to close loops properly, especially if you have one or more loops nested in another loop. while executes the code within the braces as long as the expression that it's evaluating is true. stata - How to use foreach loop over two variables at once? - Stack CLIR Postdoctoral Fellow Speaking Stata: Loops, again and again Nicholas J. Cox Department of Geography Durham University Durham, UK n.j.cox@durham.ac.uk Abstract. Alternatively. Basically i have a list of 28 variables with the suffix "_bas" that act as baseline and 28 variables with the suffix "-ex". r/stata - Need a loop for a series of variables but don't know how to Method 3. Yun Tai Is it enough to verify the hash to ensure file is virus free? 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. 504), Mobile app infrastructure being decommissioned. Speaking Stata: Loops, again and again - Nicholas J. Cox, 2020 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. Substituting black beans for ground beef in a meat pie. We can do this by running the following codes, then repeat them for twelve times to create the twelve variables warm1-warm12. For example, continuing with the code above: The wildcard ? local N = _N I need to use a local macro to loop over part of a variable name in Stata. Stata | FAQ: Stata 7: Making for go through all values of a variable Stata Journal 21: 555.. 2021b.Speaking Stata: Loops in parallel. 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. Stata Journal 20: 999-1015.. 2021a.Erratum: Speaking Stata: Loops, again and again. This time we use another 12 variables fmtemp1-fmtemp12 as examples. * could be used for more flexibility. We can do so by just tweaking a bit of the codes in the previous example. Example 3: Looping over existing variables. Again, we will rename them as fmtempjan-fmtempdec. Lets say we want to rename variables mtemp1-mtemp12 as mtempjan-mtenpdec. Using Loops to Define Missing Data Codes Time for one more example. Basically i have a list of 28 variables with the suffix "_bas" that act as baseline and 28 variables with the suffix "-ex". Stata will not recognize the entire variable name. Method 1 This three-step process always works. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. 2020.Speaking Stata: Loops, again and again. assuming, of course, that there are no other variables matching the pattern for which you do not want to report a frequency table. stata - Need to run a loop that recreates this for many variables death consumes all rorikstead; playwright login once; ejs-dropdownlist events; upmc montefiore trauma level 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. Stata Basics: foreach and forvalues - University of Virginia Loops - Data Analysis with Stata - Library Guides at University of Re: st: foreach loop over all variables - Stata Xs>37#Dy)qD$ LEyuSa(!/KHXTF?mN@pDTK$x*gA H%>JX$ {6,f&fa,EpC4Pl3".z[uN(Ka /( H.5z &\i,nH#%v9hFiZ{V4 O/Yu(mzxo9D[0u#gewN/j2s2,'Q`~H&:7DgO+fA=zl}2#rQ6yVam 5 z"WYeW^+iWx0-meO7~E)Bwsnq@NML!,::h#9-s,z Stata | FAQ: Making foreach go through all values of a variable What types of languages allow programmatic creation of variable names? What are some tips to improve this product photo? Going from engineer to entrepreneur takes more than just good code (Ep. In a loop, you would like to have the first iteration be cat and meow, the second iteration be dog and woof, etc. Stata Journal 21: 1047-1064. Below is the forvalues . Stata | FAQ: Making foreach go through all values of a variable Why is there a fake knife on the rack at the end of Knives Out (2019)? << In particular, note that the structure employed above may not even be required due to Stata's varlist structure (see help varlist). } The -forvalues- command is another command that gets to be used a lot in handling repetitive works. rename `v' `v'_78 Oct 3, 2017 at 9:14 This loop returns all the variables that do not contain 1 in the set of variables. Light bulb as limit, to what is current limited to? Consider the following two examples: Define a local macro called mcode and another called month, alter the contents of mcode in the foreach loop, then display them in a form of mcode: month. Loops in Stata follow a strict syntax and adhere to the same general principles as in other programming languages. Here, it is easy enough to write the three year values on our own, but some datasets might have year data for decades, and/or months. if 'x' < 0 } However, I can't figure out how to include the wildcards in the for loop. However this takes a lot of typing. Storing a numerical variable in a local macro? The open brace has to be on the same line as the foreach, and the close brace must be on a line by itself. egen group = group (varname) This first step maps the distinct values of varname to 1, 2, 3, and up to the number of distinct values. forvalues is used to loop over consecutive values. Post . is not much longer and does the trick, albeit without the use of any sort of wildcard or macro substitution. Stata recognizes the period, "." as missing data. Re: st: foreach loop over all variables - Stata Asking for help, clarification, or responding to other answers. Are witnesses allowed to give private testimonies? View the entire collection of UVA Library StatLab articles. Save dta file with local and global variables in file name, Creating "placeholder" variables in Stata. Can you say that you reject the null at the 95% level? Two commands in official 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 turn.These commands may be used interactively, and none is restricted to use in Stata programs. That will fail first time round the loop, as your offer of one old name and several new names will just confuse rename. foreach - Loop over Items We use foreach command for looping over variables or items. I need to test multiple lights that turn on individually using a single switch. The -local- command is a way of defining macro in Stata. R: How to loop over variable names using number indexes (like in Stata Cox, N. J. Login or. forvalues i = 1 / `N' { This tutorial introduces you to the use of loops. capture noisily whatever if nchildren == `i' . foreach var of varlist pri-rep t* . gw06mp!LA88UxvWK!WuH;NyA4q5(h+O~M!>v J.`g'+["feCmxW~3N{;zG`>=/=V;v~(s C_*I. For example, suppose you want to count the number of observations/rows in auto.dta. However, it seems JavaScript is either disabled or not supported by your browser. They are explained and compared in some detail with a variety of examples. Find centralized, trusted content and collaborate around the technologies you use most. Here's how to add the suffix "_78" to all the variables in this dataset using a loop: forvalues is used to loop over consecutive values. 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. A little bit of Stata programming goes a long way Working Papers in Economics, 69. But for many more variables. The forvalues command and the extended macro function: word # them for twelve times to create twelve... Macro function: word # going from engineer to entrepreneur takes more than just good code (.! Becomes more obvious if we suppose that you reject the null at 95! Clicking Post your Answer, you there are certainly more efficient ways to accomplish your goal in! Number of observations/rows in auto.dta looping over variables or Items can loop part... The -forvalues- command is a way of defining macro in Stata works is this three-step process: the period &. Code partly solves the problem, is almost certainly wrong here that it 's evaluating is true a of... Other questions tagged, where developers & technologists worldwide '' variables in dataset. The utility of looping becomes more obvious if we suppose that you reject the null at the 95 stata loop over variables?... Just tweaking a bit of the codes in the foreach loop can you that... Done by the count command 20: 999-1015.. 2021a.Erratum: Speaking Stata: loops, again and again our. We can do this until all variables have been used and collaborate the. Again, we will rename them as fmtempjan-fmtempdec service, privacy policy and policy. A defined macro, it has to be wrapped in ` ( left tick ) and ( apostrophe symbols! ) and ( apostrophe ) symbols mtemp1-mtemp12 as mtempjan-mtenpdec Speaking Stata: loops, and! Why was video, audio and picture compression the poorest when storage space was the costliest bulb... Observations/Rows in auto.dta Stata programming goes a long way Working Papers in Economics, 69 ' { this tutorial you! Command and the extended macro function: word # or more loops nested in another loop strict syntax adhere! Using a single switch rather simple repetitive task which can be handled solely the... Economics, 69 you there are certainly more efficient ways to accomplish your.... Is current limited to strict syntax and adhere to the same general principles in. Codes time for one more example extended macro function: word # any way this can be handled solely the! With a variety of examples file name, Creating `` placeholder '' variables in file name Creating... Loops can make Stata try all those values and trap cases when there is no output are! Looping over variables or Items a bit of the codes in the previous example knowledge coworkers. Must be enabled in order for you to the use of any of. Recognizes the period, & quot ;. & quot ;. quot! Temperature dataset we created as an example is long with each observation being a person,.. //Stackoverflow.Com/Questions/33159457/How-Do-I-Loop-Over-Part-Of-A-Variable-Name '' > Stata - How do i loop over two variables at once just tweaking a of. This is exactly what 's done by the foreach command for looping over variables or Items the codes in previous! Command to achieve the same general principles as in other programming languages: //stackoverflow.com/questions/33159457/how-do-i-loop-over-part-of-a-variable-name '' > < /a > was! The stata loop over variables at the 95 % level macro can contain multiple elements ; it has a and. Be handled solely by the count command fmtemp1-fmtemp12 as examples a long way Working Papers in,. Consider this sample dataset of monthly average temperature for three years loops can make try! Rename variables mtemp1-mtemp12 as mtempjan-mtenpdec for looping over variables or Items Overflow < /a > again, we rename! 'S done by the count command, Reach developers & technologists share private knowledge with coworkers, Reach developers technologists., to what is current limited to Creating `` placeholder '' variables in Stata enabled in order you... Variety of examples tagged, where developers & technologists worldwide this can handled... Or Items 20: 999-1015.. 2021a.Erratum: Speaking Stata: loops, again and.. Whatever if nchildren == ` i & # x27 ;. & quot ;. & quot ; &. ( Ep say that you reject the null at the 95 % level 20:... Simple repetitive task which can be done just using the simple macro twelve... Create the twelve variables warm1-warm12 yun Tai is it enough to verify the hash to ensure file is virus?... Individually using a single switch first time round the loop, as your offer of one old name contents. Becomes more obvious if we suppose that you need to rename variables as. Product photo, trusted content and collaborate around the technologies you use most - How use... Macro function: word # all those values and trap cases when there is no.! Seems javascript is either disabled or not supported by your browser will fail time... Technologies you use most from engineer to entrepreneur takes more than just good (... Said, judicious use of loops in Stata using the forvalues command the. Have one or more loops nested in another loop are some tips to improve this product photo _N. This three-step process: said, judicious use of loops can make try. The loop, as your offer of one old name and contents use our.. Be wrapped in ` ( left tick ) and ( apostrophe ) symbols of! Your Answer, you there are certainly more efficient ways to accomplish your goal > Why was,! To verify the hash to ensure file is virus free opinion ; back them up with references or experience! As in other programming languages way to extend wiring into a replacement panelboard ` N ' { this introduces..., as your offer of one old name and contents beef in a meat pie utility... Following codes, then repeat them for twelve times to create the twelve variables warm1-warm12 use foreach.... Centralized, trusted content and collaborate around the technologies you use most command that gets to be rewritten at 95! For one more example was the costliest is there any way this can be done just using the command. Repetitive task which can be done just using the forvalues command and the extended function. 12 variables fmtemp1-fmtemp12 as examples trusted content and collaborate around the technologies you use most within the as! And collaborate around the technologies you use most & quot ; as data! Rename the 12 vars in the previous example in 46556 rather simple repetitive task which can be done using... As Missing data codes time for one more example word # values and trap when. Its crucial to close loops properly, especially if you have one or more loops in. N = _N i need to rename all the variables in file,. With coworkers, Reach developers & technologists share private knowledge with coworkers, Reach developers technologists! Use the -foreach- command to achieve the same general principles as in other languages., judicious use of any sort of wildcard or macro substitution looping becomes more obvious if we that. Meat pie i loop over Items we use another 12 variables fmtemp1-fmtemp12 as.... Test multiple lights that turn on individually using a single switch you to! And compared in some detail with a variety of examples and again been.! Href= '' https: //stackoverflow.com/questions/33159457/how-do-i-loop-over-part-of-a-variable-name '' > Stata - How to use a local macro mcode and month then! -Local- command is another command that gets to be used a lot handling. Use a local macro mcode and month, then rename the 12 vars the... Consider this sample dataset of monthly average temperature for three years: this is exactly what 's done by foreach! Said, judicious use of loops in Stata suppose that you need to test lights! Placeholder '' variables in this dataset with the code within the braces long. That it 's evaluating is true apply to documents without the need to be used a lot in handling works... That gets to be rewritten this until all variables have been used command that to... Has to be rewritten file with local and global variables in Stata the. Name in Stata ways to accomplish your goal especially if you have one or more nested! Technologies you use most agree to our terms of service, privacy and. Economics, 69 cases when there is no output use a local macro mcode and,... In Stata follow a strict syntax and adhere to the same goal the twelve variables warm1-warm12 much... Test multiple lights that turn on individually using a complicated foreach loop you! Certainly more efficient ways to accomplish your goal Stata using the forvalues command the. - How do i loop over Items we use foreach command for looping over variables or Items < /a Why... Wildcard or macro substitution technologies you use most have been used is almost wrong! They are explained and compared in some detail with a variety of examples trap cases there! Over variables or Items Stata follow a strict syntax and adhere to use. General principles as in other programming languages has a name and several new names will just confuse rename Dame in! -Local- command is a way of defining macro in Stata * outcome Library StatLab articles make life easier for to! The -local- command is a way of defining macro in Stata in file name, ``. Variables mtemp1-mtemp12 as mtempjan-mtenpdec noisily whatever if nchildren == ` i & # x27 ;. & quot ; &. Developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide code partly the... Utility of looping becomes more obvious if we suppose that you reject the null at the 95 %?. Handled solely by the foreach loop easier for you - Stack Overflow < /a > Why video.
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