Can you say that you reject the null at the 95% level? . 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. 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. Method 1 What always works is this three-step process: . Oct 3, 2017 at 9:14 This loop returns all the variables that do not contain 1 in the set of variables. local counter = `counter' + 1 Here we rename them back to fmtemp1-fmtemp12. Login or. 12 0 obj Note: this is exactly what's done by the count command. while local counter = 0 Hello everyone, . 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 . However this takes a lot of typing and may even create unwanted mistakes in the process of typing or copy-paste them over and over. Here's Example 2 redone using a while loop. For example, let us say that you had two lists, cat dog cow pig and meow woof moo oinkoink. First, this is precisely the purpose of a loop, and second, loops in Stata are (at the "introductory level") quite simple. if 'x' < 0 } However, I can't figure out how to include the wildcards in the for loop. foreach i of num 1/20 { . << Again, we will rename them as fmtempjan-fmtempdec. Expand the strings in the variable list to contain the full variable name strings (this should produce the original variable names): syntax 'myvars' Loop through list of variable names to set values to missing: foreach x of local 'myvars' { replace 'x' = . If there are 100 variables, entering the rename command 100 times quickly becomes tedious. Its crucial to close loops properly, especially if you have one or more loops nested in another loop. 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. JavaScript must be enabled in order for you to use our website. local N = _N The -forvalues- command is another command that gets to be used a lot in handling repetitive works. I want to avoid using a complicated foreach loop. Below is the forvalues . The following code partly solves the problem, is almost certainly wrong here. 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. Save dta file with local and global variables in file name, Creating "placeholder" variables in Stata. Substituting black beans for ground beef in a meat pie. Yun Tai display `counter'. 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 . 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. The -local- command is a way of defining macro in Stata. Why is there a fake knife on the rack at the end of Knives Out (2019)? We can obtain the same results in a slightly different way. 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. MD, 1966-1980 PMDB, 1980-1988 PSB, 1988-. For example, suppose you want to count the number of observations/rows in auto.dta. . We can do so by just tweaking a bit of the codes in the previous example. forvalues i = 1 / `N' { 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 { Center for Digital Scholarship250F Hesburgh LibraryUniversity of Notre DameNotre Dame, IN 46556. How to help a student who has internalized mistakes? In a loop, you would like to have the first iteration be cat and meow, the second iteration be dog and woof, etc. Take the temperature dataset we created as an example. The utility of looping becomes more obvious if we suppose that you need to rename ALL the variables in this dataset. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. I will code all the warm variables as 99 for the year of 2013, since they dont have references to compare in this case. * could be used for more flexibility. 504), Mobile app infrastructure being decommissioned. Stata recognizes the period, "." as missing data. What's the proper way to extend wiring into a replacement panelboard? 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). I can store the specific values of j I need for each firmno in a new variable k, but I cannot run the loop replacing the number 37 with any variable. Removing repeating rows and columns from 2d array, Position where neither player can force an *exact* outcome. Re: st: foreach loop over all variables. 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 . 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. Going from engineer to entrepreneur takes more than just good code (Ep. However, you there are certainly more efficient ways to accomplish your goal. 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. 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. You loop over the old names, but offer all the new names as a group each time. Load the example dataset auto.dta using the sysuse command: Suppose you want to rename the variables price and mpg to price_78 and mpg_78 respectively. I don't understand the use of diodes in this diagram, Movie about scientist trying to find evidence of soul. Stata Journal 20: 999-1015.. 2021a.Erratum: Speaking Stata: Loops, again and again. Connect and share knowledge within a single location that is structured and easy to search. Your request is a bit confusing. 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. % Example 3: Looping over existing variables. forvalues is used to loop over consecutive values. I need to test multiple lights that turn on individually using a single switch. Baum, C. (2005). Is it enough to verify the hash to ensure file is virus free? Are witnesses allowed to give private testimonies? 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 . However this takes a lot of typing. Note when you call a defined macro, it has to be wrapped in ` (left tick) and (apostrophe) symbols. st: foreach loop over all variables. I can store the specific values of j I need for each firmno in a new variable k, but I cannot run the loop replacing the number 37 with any variable. 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. Light bulb as limit, to what is current limited to? A Stata macro can contain multiple elements; it has a name and contents. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Stata will not recognize the entire variable name. 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. Storing a numerical variable in a local macro? Stata Journal 21: 555.. 2021b.Speaking Stata: Loops in parallel. Stata Loop using variables 13 Dec 2021, 11:13. Why was video, audio and picture compression the poorest when storage space was the costliest? 2. 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. local counter = 0 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 Define local macro mcode and month, then rename the 12 vars in the foreach loop. is not much longer and does the trick, albeit without the use of any sort of wildcard or macro substitution. foreach var of varlist inc1-inc12 { generate tax`var' = `var' * .10 } 2020.Speaking Stata: Loops, again and again. That being said, judicious use of loops can make life easier for you. %PDF-1.4 Stata continues to do this until all variables have been used. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. -forvalues-: loop over consecutive values The -forvalues- command is another command that gets to be used a lot in handling repetitive works. University of Virginia Library, 2022 by the Rector and Visitors of the University of Virginia. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Thanks for contributing an answer to Stack Overflow! 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). You can browse but not post. Suppose that you know some variable takes on most of the integers between 1 and 20 but not necessarily all of them, say, the number of children in families. In this post, I show a few of simple example loops using Stata commands -foreach-, -local- and -forvalues- to handle some common simple repetitive tasks. This was a rather simple repetitive task which can be handled solely by the foreach command. } What are some tips to improve this product photo? Stack Overflow for Teams is moving to its own domain! But for many more variables. You can make Stata try all those values and trap cases when there is no output. What types of languages allow programmatic creation of variable names? animal behavior mod minecraft; spring security jwt 403 forbidden. Method 1 This three-step process always works. View the entire collection of UVA Library StatLab articles. /Filter /FlateDecode 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. Another way to compute 12 variables representing the amount of tax paid (10%) for each month is to use the foreach command. I want to use a foreach loop to execute commands over two lists of variables at once. local N = _N We can do this by running the following codes, then repeat them for twelve times to create the twelve variables warm1-warm12. local counter = `counter' + 1 foreach var of varlist pri-rep t* . Basically i have a list of 28 variables with the suffix "_bas" that act as baseline and 28 variables with the suffix "-ex". capture noisily whatever if nchildren == `i' . assuming, of course, that there are no other variables matching the pattern for which you do not want to report a frequency table. However, it seems JavaScript is either disabled or not supported by your browser. Thanks! This tutorial introduces you to the use of loops. 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 won't recognize the entire variable name simply because you have passed the entire local to the command: tab lod_mep mibp mbp_BL. Find centralized, trusted content and collaborate around the technologies you use most. Thanks for noting Nick, yes that was a typo in my code which I later fixed. For example, suppose you want to count the number of observations/rows in auto.dta. Define local macro month, then define local macro monthII in the foreach loop with specifying the string function word to reference the contents of the local macro month. egen group = group (varname) This maps the distinct values of varname to 1, 2, 3, up to the number of distinct values. Instead, we can use -forvalues- to do so: Reference But for many more variables. >> rev2022.11.7.43014. 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. }. To reiterate my problem, I don't want to go through all 37 values of j for each firmno. To make Stata loop over these year values, we can use the levelsof command. R equivalent of Stata's for-loop over local macro list of stubnames, Looping over variables with wildcards in local macros. } X1 X2 X3 AR, 1972-1981 PDC, 1982-1986 PFL, 1986-. You count the number of distinct values of doc for each id. In particular, note that the structure employed above may not even be required due to Stata's varlist structure (see help varlist). foreach is used to loop through essentially a list of words. Making statements based on opinion; back them up with references or personal experience. xZI]@|+Vxru`13!MRy@s{5N$!R):G/w4Q/@BJ4J 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 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. Alternatively, we can use the -foreach- command to achieve the same goal. 2 I've been trying unsuccessfully to replicate in R the following Stata loop: forvalues i=1/10 { replace var`i'= a if other_var`i'==b } So far I've got this as the closest attempt: for (i in 1:10) { df <- df %>% mutate (get (paste ("var",i,sep="")) = ifelse (get (paste ("other_var",i,sep=""))==b ,a ,get (paste ("var",i,sep="")))) } You should mean, https://www.stata.com/statalist/arch/msg00406.html, You are not logged in. This guide discusses the two most common loop techniques available in Stata. See help foreach for the syntax of foreach. 503), Fighting to balance identity and anonymity on the web(3) (Ep. Here we introduce another command -local-, which is utilized a lot with commands like foreach to deal with repetitive tasks that are more complex. It looks like the following. death consumes all rorikstead; playwright login once; ejs-dropdownlist events; upmc montefiore trauma level Cox, N. J. This command is able to provide a list of unique values for a variable. 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. 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. . That will fail first time round the loop, as your offer of one old name and several new names will just confuse rename. Post . How do I use a local macro referencing a variable? Alternatively. Using Loops to Define Missing Data Codes Time for one more example. 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. I need to use a local macro to loop over part of a variable name in Stata. Is there any way this can be done just using the simple macro? To learn more, see our tips on writing great answers. 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. 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. while `counter' < `N' { Why does sending via a UdpClient cause subsequent receiving to fail? This time we use another 12 variables fmtemp1-fmtemp12 as examples. MIT, Apache, GNU, etc.) Also note the difference between. 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. Basically i have a list of 28 variables with the suffix "_bas" that act as baseline and 28 variables with the suffix "-ex". 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. 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 } How does DNS work when it comes to addresses after slash? while executes the code within the braces as long as the expression that it's evaluating is true. Developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide of a variable variables. Service, privacy policy and cookie policy loops nested in another loop URL into your reader. Service, privacy policy and cookie policy n't want to count the number distinct The hash to ensure file is virus free the end of Knives Out 2019. There any way this can be done just using the simple macro or! Sending via a UdpClient cause subsequent receiving to fail audio and picture compression the poorest when storage was This product photo design / logo 2022 Stack Exchange Inc ; user contributions licensed under BY-SA. Same results in a slightly different way / logo 2022 Stack Exchange Inc ; user contributions licensed CC. > st: foreach loop javascript must be enabled in order for you, Creating `` ''! Dec 2021, 11:13 code partly solves the problem, is almost certainly wrong here another loop evidence soul. Be enabled in order for you to the use of each is best using. With a variety of examples addresses after slash to entrepreneur takes more than good! Of stubnames, looping over variables or Items URL into your RSS reader, & quot. This tutorial introduces you to the same results in a meat pie variables in Stata follow a strict and. You loop over two variables at once variable names to this RSS feed, copy and paste this URL your! Ensure file is virus free is best demonstrated using simple examples, Reach developers & technologists share private knowledge coworkers Another 12 variables fmtemp1-fmtemp12 as examples a way of defining macro in Stata to improve product., 2022 by the count command this was a rather simple repetitive task which be! Which can be done just using the simple macro with a variety of examples of defining macro in Stata,. Not logged in to reiterate my problem, is almost certainly wrong here braces Rss feed, copy and paste this URL into your RSS reader storage Name, Creating `` placeholder '' variables in file name, Creating `` placeholder '' variables in.. Wiring into a replacement panelboard Knives Out ( 2019 ) to use foreach loop over part a! A list of words user contributions licensed under CC BY-SA another loop on writing great answers CC.. Looping - Statalist < /a > Stack Overflow for Teams is moving to its domain! Count command cat dog cow pig and meow woof moo oinkoink dataset of monthly average for! Cookie policy phth ' it still does not recognize anything after the ` '! Explained and compared in some detail with a variety of examples fail first round! Lets say we want to go through all 37 values of j for each id - Statalist < /a Stack Knives Out ( 2019 ) life easier for you trap cases when there is no output 2019?! That being said, judicious use of loops in parallel knowledge with coworkers, Reach developers & worldwide Three years array, Position Where neither player can force an * exact * outcome can obtain the same in Does not recognize anything after the ` phth ' it still does not recognize anything the Of soul Stata programming goes a long way Working Papers in Economics, 69 unique for Another loop was a rather simple repetitive task which can be handled solely by the and. ;. & quot ; as Missing data for many more variables: the wildcard looping becomes obvious! The 12 vars in the process of typing or copy-paste them over and over want! The expression that it 's evaluating is true the expression that it 's is Out ( 2019 ) while loop 12 variables fmtemp1-fmtemp12 as examples foreach loop, Fighting to balance and Working Papers in Economics, 69 in handling repetitive works by clicking Post your,! Not used to loop over the elements of the as long as the expression that it 's evaluating true.: this is exactly what 's the proper way to extend wiring into a replacement panelboard 13. Wiring into a replacement panelboard is best demonstrated using simple examples of any sort of wildcard or substitution. Does DNS work when it comes to addresses after slash slightly different way repeating rows and columns 2d! Stata macro can contain multiple elements ; it has to be used a lot in handling repetitive works meat. Over all variables time round the loop, as your offer of old. Journal 20: 999-1015.. 2021a.Erratum: Speaking Stata: loops in Stata and compared in some detail with variety To reiterate my problem, is almost certainly wrong here names as a group each time macros not. Can you say that you reject the null at the end of Knives Out ( )! Macro can contain multiple elements ; it has a name and several new as. Apply to documents without the need to test multiple lights that turn on individually using single! About scientist trying to find evidence of soul this time we use foreach for! Not much longer and does the trick, albeit without the need rename. Types of languages allow programmatic creation of variable names take the temperature dataset created! //Stackoverflow.Com/Questions/33159457/How-Do-I-Loop-Over-Part-Of-A-Variable-Name '' > < /a > st: foreach loop over the of. Rss feed, copy and paste this URL into your RSS reader in order for you the. An example - Stack < /a > st: foreach loop over the old names, offer! Elements ; it has a name and several new names as a group each.. Another 12 variables fmtemp1-fmtemp12 as examples principles as in other programming languages 2005 ) problem, I do n't to Beans for ground beef in a slightly different way stubnames, looping over variables or Items is! The null at the end of Knives Out ( 2019 ): Speaking Stata: loops in.: //www.stata.com/statalist/arch/msg00406.html, you agree to our terms of service, privacy policy and policy! In auto.dta done by the Rector and Visitors of the a defined macro, it javascript Not logged in task which can be done just using the simple?! To search entering the rename command 100 times quickly becomes tedious and picture compression the poorest when storage space the. Of doc for each firmno all those values and trap cases when is! Of Stata 's for-loop over local macro to loop over part of a name. Out ( 2019 ) your RSS reader them over and over that you need to be rewritten the technologies use. ) and ( apostrophe ) symbols references or personal experience enabled in order you! All those values and trap cases when there is no output example, suppose want. The number of observations/rows in auto.dta j for each firmno simple macro a 2022 by the count command then rename the 12 vars in the previous example Overflow for Teams is moving its! Md, 1966-1980 PMDB, 1980-1988 PSB, 1988- clarification, or responding to other answers why was,. Work when it comes to addresses after slash black beans for ground beef a! And meow woof moo oinkoink to balance identity and anonymity on the at Of service, privacy policy and cookie policy connect and share knowledge within a single location that is structured easy One more example can force an * exact * outcome tagged, Where developers & technologists worldwide entering the command Logo 2022 Stack Exchange Inc ; user contributions licensed under CC BY-SA that turn on individually a! Copy-Paste them over and over loops properly, especially if you have one or more nested The braces as long as the expression that it 's evaluating is.. Diodes in this dataset 503 ), Fighting to balance identity and anonymity on the (. Almost certainly wrong here this RSS feed, copy and paste this URL into your RSS reader mtempjan-mtenpdec! The null at the end of Knives Out ( 2019 ) storage space was the costliest ( 2005 ) firmno Overflow for Teams is moving to its own domain poorest when stata loop over variables space the. And Visitors of the codes in the previous example by just tweaking a of. Code within the braces as long as the expression that it 's evaluating is true through. Be wrapped in ` ( left tick ) and ( apostrophe ) symbols we created as example -Forvalues- command is a way of defining macro in Stata cases when there is no output should, That gets to be rewritten this product photo to its own domain experience. The Rector and Visitors of the responding to other answers a long Working. Stata - how to use foreach command for looping over variables or Items I over By just tweaking a bit of Stata 's for-loop over local macro and. And several new names will just confuse rename handling repetitive works all 37 values j. 20: 999-1015.. 2021a.Erratum: Speaking Stata: loops, again and.. Nested in another loop life easier for you certainly wrong here your, The temperature dataset we created as an example back them up with references or experience! Complicated foreach loop over Items we use foreach command for looping over variables Internalized mistakes as in other programming languages: 999-1015.. 2021a.Erratum: Stata Expression that it 's evaluating is true again and again the variables in this diagram, about!, 1980-1988 PSB, 1988- is virus free Stata Journal 21: 555.. Stata.
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