Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.

# st: AW: RE: Number of a subset of variables in local

 From "Martin Weiss" To Subject st: AW: RE: Number of a subset of variables in local Date Thu, 19 Aug 2010 15:45:31 +0200

```<>

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).

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/
```