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From |
"Sergiy Radyakin" <serjradyakin@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: loop to rename vars |

Date |
Fri, 10 Oct 2008 16:02:04 -0400 |

On Fri, Oct 10, 2008 at 3:33 PM, Steven Samuels <sjhsamuels@earthlink.net> wrote: > Sorry, -Sergiy- for my last remark on Statalist-it was uncalled for. > > -Steve No problem, Steven. > On Oct 10, 2008, at 3:23 PM, Sergiy Radyakin wrote: > >> Does not seem to work: >> >> //----------------------------------------------------- >> clear >> sysuse auto >> renvars \ var1-var`c(k)' >> \ invalid name >> r(198); >> >> renvars var1-var`c(k)' >> r(111); >> >> renvars * var1-var`c(k)' >> variable var1 not found >> r(111); >> >> which renvars >> c:\ado\plus\r\renvars.ado >> *! 2.2.1 15aug2000 Jeroen Weesie/ICS >> >> version >> version 9.2 >> ************************************************************* >> >> Perhaps I am doing something wrong?? Is slash required? Did you mean >> -renamev- ? >> >> From the source code it follows that (at least sometimes) it may stop >> with a message >> di in re "`oldname' could not be renamed to `newname'" >> >> Is this what you mean will happen? It should never occur in the case >> in question because vars may be sequentially numbered, and >> 32-character names allow you to allocate more names than the Stata >> limit. >> >> My preferred strategy would be to: >> 1. generate K temporary variable names (note that it is Stata's >> responsibility to ensure that the suggested variable name is unique) >> 2. rename each variable to the temporary name >> 3. rename each variable to the sequential name >> >> program rename_seq >> forvalues i=1/`=c(k)' { >> tempvar tmp`i' >> } >> ds >> local i = 1 >> foreach var of varlist `r(varlist)' { >> rename `var' `tmp`i'' >> local ++i >> } >> ds >> local i = 1 >> foreach var of varlist `r(varlist)' { >> rename `var' var`i' >> local ++i >> } >> end >> /* any resemblance to the code of Friedrich is purely coincidential */ >> >> Regards, S.R. >> >> >> >> >> On Fri, Oct 10, 2008 at 2:46 PM, Nick Cox <n.j.cox@durham.ac.uk> wrote: >>> >>> You can try it and see how smart the authors were (on this point). >>> >>> Nick >>> n.j.cox@durham.ac.uk >>> >>> Sergiy Radyakin >>> >>> On Fri, Oct 10, 2008 at 2:26 PM, Nick Cox <n.j.cox@durham.ac.uk> wrote: >>>> >>>> You don't need to fire up -ds- beforehand. This can thus be reduced to >>>> >>>> local i = 1 >>>> foreach var of var * { >>>> ren `var' var`i' >>>> local ++i >>>> } >>>> >>>> In fact you don't need a loop. With -renvars- from the Stata Journal >>>> (-search renvars- for location) you can go >>>> >>>> renvars \ var1-var`c(k)' >>> >>> What if var5 already exists (and it is 10th in order). Will -renvars- >>> be intelligent enough to sense it and adjust numbering accordingly? or >>> will it just crash with error 110 after renaming the fifth variable? >>> >>>> >>>> c(k) is held by Stata as the number of variables -- see results of >>>> -creturn li- and it has a local macro persona `c(k)'. >>>> >>>> Naturally -renvars- is doing the loop on your behalf. It also checks >>> >>> for >>>> >>>> name problems. >>>> >>>> If Mai does not want all variables renamed, then the advice is >>> >>> modified >>>> >>>> accordingly. >>>> >>>> Nick >>>> n.j.cox@durham.ac.uk >>>> >>>> Friedrich Huebler >>>> >>>> ds >>>> local i = 1 >>>> foreach var of varlist `r(varlist)' { >>>> ren `var' var`i' >>>> local ++i >>>> } >>>> >>>> >>>> On Thu, Oct 9, 2008 at 11:31 PM, mai7777 <mai7777@gmail.com> wrote: >>>> >>>>> How can I loop over vars to rename them by their order number. >>>>> so they become var1, var2, var3...? >>> >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/statalist/faq >>> * http://www.ats.ucla.edu/stat/stata/ >>> >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/statalist/faq >> * http://www.ats.ucla.edu/stat/stata/ > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: loop to rename vars***From:*mai7777 <mai7777@gmail.com>

**Re: st: loop to rename vars***From:*"Friedrich Huebler" <fhuebler@gmail.com>

**RE: st: loop to rename vars***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**Re: st: loop to rename vars***From:*"Sergiy Radyakin" <serjradyakin@gmail.com>

**RE: st: loop to rename vars***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**Re: st: loop to rename vars***From:*"Sergiy Radyakin" <serjradyakin@gmail.com>

**Re: st: loop to rename vars***From:*Steven Samuels <sjhsamuels@earthlink.net>

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