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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
AW: st: AW: RE: Number of a subset of variables in local |

Date |
Thu, 19 Aug 2010 16:26:30 +0200 |

<> Sorry about that, Antoine, I never meant to spoil your vacation planning, but a word of warning appeared appropriate for Sven. In fact, blowing up a problem by the factor of 100 to test the stability of its solution is always a good idea. -help limits- is an underappreciated resource, IMHO. So several issues got mixed up in our posts, and I am not in a position to disentagle them, but I know there is a very prominent lister who will clear up the mess... The -length of string in string expression: 244- in -h limits- is central to this enterprise, as is NJC`s Stata tip cited before. That much I do know... HTH Martin -----Ursprüngliche Nachricht----- Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Antoine Terracol Gesendet: Donnerstag, 19. August 2010 16:08 An: statalist@hsphsun2.harvard.edu Betreff: Re: st: AW: RE: Number of a subset of variables in local <> I need to take some additional vacations... the correct syntax for the second solution is of course local mycount2: word count `myvars' and not local mycount2: word count myvars or local mycount2:word count(`"`myvars'"') On 19/08/2010 16:02, Antoine Terracol wrote: > OK, in fact, with lists larger than 37 names, both the following work: > > local mycount1: list sizeof myvars > local mycount2: word count myvars > > but > > local mycount3=wordcount("`myvars'") will byte > > -------------------------------------- > clear* > > forv i=1/100{ > gen name`i'=. > } > > unab myvars: name* > local mycount1: list sizeof myvars > local mycount2:word count(`"`myvars'"') local mycount2:word count `myvars' > local mycount3=wordcount("`myvars'") > di `mycount1' > di "`mycount2'" > di "`mycount3'" > ----------------------------------------- > > Antoine > > On 19/08/2010 15:54, Antoine Terracol wrote: >> Right, had forgotten about that (though I've been beaten more than >> once...) >> >> So I guess the correct 2-liner would be: >> >> unab myvars : name* >> local mycount: list sizeof myvars >> >> Antoine >> >> >> >> On 19/08/2010 15:45, Martin Weiss wrote: >>> >>> <> >>> >>> Also, Sven, you want to be extra careful when applying both solutions >>> to a >>> large project, i.e. many members of the -varlist- "name*": >>> >>> ************* >>> clear* >>> >>> forv i=1/100{ >>> gen name`i'=. >>> } >>> >>> unab myvars1: name* >>> local mycount1=wordcount("`myvars1'") >>> >>> qui d name*, varlist >>> *local myvars2 `r(varlist)' >>> local myvars2 =r(varlist) >>> local mycount2: list sizeof myvars2 >>> ma di >>> >>> di in r `mycount1' ", " `mycount2' >>> ************* >>> >>> >>> If you comment in the line >>> >>> - local myvars2 `r(varlist)'- >>> >>> and -consequently- comment out the line below it, you will get the >>> correct >>> result "100" for -local- "mycount2". See NJC`s >>> http://www.stata-journal.com/article.html?article=pr0045 for >>> explanations... >>> >>> >>> HTH >>> Martin >>> >>> >>> -----Ursprüngliche Nachricht----- >>> Von: owner-statalist@hsphsun2.harvard.edu >>> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Trelle Sven >>> Gesendet: Donnerstag, 19. August 2010 15:27 >>> An: statalist@hsphsun2.harvard.edu >>> Betreff: st: RE: Number of a subset of variables in local >>> >>> Thanks to Martin and Antoine, that was quick. >>> Both solutions work fine (Antoine's is two lines though). >>> Thread closed. Sven >>> >>> Two line solution: >>> unab myvars : name* >>> local mycount=wordcount("`myvars'") >>> >>> Three line solution: >>> d name*, varlist >>> local myvars=r(varlist) >>> local mycount: list sizeof myvars >>> >>> >>> >>> >>> * >>> * 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/ >>> >> > -- Ce message a ete verifie par MailScanner pour des virus ou des polluriels et rien de suspect n'a ete trouve. * * 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/

**Follow-Ups**:**RE: st: AW: RE: Number of a subset of variables in local***From:*Nick Cox <n.j.cox@durham.ac.uk>

**References**:**st: Number of a subset of variables in local***From:*"Trelle Sven" <strelle@ctu.unibe.ch>

**st: AW: Number of a subset of variables in local***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**st: RE: Number of a subset of variables in local***From:*"Trelle Sven" <strelle@ctu.unibe.ch>

**st: AW: RE: Number of a subset of variables in local***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**Re: st: AW: RE: Number of a subset of variables in local***From:*Antoine Terracol <Antoine.Terracol@univ-paris1.fr>

**Re: st: AW: RE: Number of a subset of variables in local***From:*Antoine Terracol <Antoine.Terracol@univ-paris1.fr>

**Re: st: AW: RE: Number of a subset of variables in local***From:*Antoine Terracol <Antoine.Terracol@univ-paris1.fr>

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