Re: st: problems with e(sample)

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 04:22 PM 6/16/2006, Zurab Sajaia wrote:
> Hi all,
>
> I ecountered a problem with disapearing e(sample) and couldn't find 
> what can be wrong:
>
> I have an eclass program, which sets leaves some ereturn parameters 
> as well as setting e(sample)
>
> program myprogram, eclass
>
> ...
> ereturn post, esample(`touse')
> ereturn local cmd="myprogram"
> ...
>
> count if e(sample)
> end // myprogram
>
> When I run the program -count- within the program displays correct 
> number but if I write
> .count if e(sample) from command line, it returns 0. Somehow 
> e(sample) gets cleared although other parameters, for example e(cmd) 
> still contains "myprogram".
We might need to see a little more code here.  Here is my version of 
myprogram.ado:

program myprogram, eclass
        tempvar touse
        gen `touse' = 1
        ereturn post, esample(`touse')
        ereturn local cmd="myprogram"
        count if e(sample)
end

Here it is in action:

. sysuse auto
(1978 Automobile Data)

. myprogram
   74

. count if e(sample)
   74

So, it seems to work fine for me.  i also tried

gen `touse' = foreign

and that worked fine too, yielding counts of 22.  So, I don't think 
there is an inherent problem, but something else in your code may be 
zapping things.


-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
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