<>
So what is the bottom line on this -foreach in- issue? -foreach- passes on
the space-delimited elements of whatever it finds between "in" and "{", as
they are, w/o expansion of any kind. If inside the loop you get lucky and
issue a command that does the unabbreviation for you, kudos to you. But
issuing a command like -replace- that requires a single variable name, not a
-varlist-, let`s it all crash...
*************
clear
set obs 10
gen x1=9
gen x2=8
gen y1=9
gen y2=0
local i 0
foreach var in x*{
loc ++i
di in red "Times thru the loop: " `i'
d `var'
// does not work as it requires a single variable
// replace `var'=8
}
local i 0
foreach var in x* y*{
loc ++i
di in red "Times thru the loop: " `i'
d `var'
// does not work as it requires a single variable
// replace `var'=8
}
*************
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Nick Cox
Gesendet: Mittwoch, 29. April 2009 20:35
An: [email protected]
Betreff: RE: st: AW: Merging database
Correct about my typo. The example is also irrelevant, because of the
main issue, now clarified in my previous post.
Nick
[email protected]
Eric A. Booth
You need to make your "V*" lowercase "v*" in your example because v1,
v2, v3 are lowercase (in original do-file, my V's were uppercase)
clear
set obs 1
*obs was 0, now 1
gen v1 = 1
gen v2 = 2
gen v3 = 3
foreach x in v* {
d `x'
}
On Apr 29, 2009, at 1:20 PM, Nick Cox wrote:
> Well, it does not work for me. (I do know what a wildcard like V*
> means
> in Stata. The point is that you need -of var- to make explicit that
> you
> have one.)
>
> . clear
>
> . set obs 1
> obs was 0, now 1
>
> . gen v1 = 1
>
> . gen v2 = 2
>
> . gen v3 = 3
>
> . foreach v in V* {
> 2. d `v'
> 3. }
> variable V* not found
> r(111);
>
> Nick
> [email protected]
>
> Eric A. Booth
>
> On Apr 29, 2009, at 12:03 PM, Nick Cox wrote:
>
>> I have various comments on this code.
>>
>> 1. -foreach x in V*- won't work. Eric is probably thinking of
>> -foreach x of var V*- but in this case -foreach v in V1 V2 V3- takes
>> no more thought.
>>
>
> -foreach x in V*- works for fine for me. It loops over all the
> variables V1-V3.
>
>
> *
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