Vladimir, Nick, Rajesh & Johannes,
Many thanks for your advice. It is so nice to use a list like this where you are not castigated for your ignorance - especially when I missed an earlier thread.
Janet
----- Original Message ----
From: Vladimir Vakhitov <[email protected]>
To: [email protected]
Sent: Wednesday, 26 March, 2008 6:10:47 PM
Subject: Re: st: Re: Loop syntax
Janet,
Talking just on a syntax matter, -then tcount==tcount+1- is incorrect.
If you need just a number at the end, announce a local first before
the loop and then increment this local within the loop:
local tcount=0
forvalues <...> {
if <...> {
local ++tcount
}
}
di `tcount'
However, I think the other solutions proposed here are better, and I
just wanted to make a comment on the proper syntax of your command.
Vladimir.
2008/3/26, Janet Hill <[email protected]>:
> I have some results on 236 patients and each patient has 57 recordings stored in a single variable t. I am trying to count how many of these patients have a score of t>0.. I tried the following code:
>
> gen tcount=0
> forvalues i=1/236{
> forvalues j=1/57{
> if patient==`i' & t>0 {
> then tcount==tcount+1
> continue
> }
> }
> }
>
> but the value of tcount never changes from 0.
>
> Could somebody please explain the correct syntax.
> Thanks,
> Janet
>
>
>
>
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