Re: st: Event within dates

[David Kantor <kantor.d@att.net>]

Hi.

1: You didn't state what you did exactly.
2: I haven't tested the code; it's just a suggestion. But it looks legal to me.
3: Please see my second reply -- that starts "Oops". It offers a correction.
4: What I wrote was not complete. It was intended to sit in the 
context in which you had set the value of the local N. I suspect that 
that was the problem.
In that case, you need to precede the given code with...
 local N=_N

But you can also skip that by using macro-expression evaluation:
forval i = 1/ `=_N' {
        forval j = 1/ `=_N' {
etc. etc.

HTH
--David

At 05:34 PM 12/1/2011, you wrote:
> Thanks for the approach. But I am sorry when I tried it I got an 
> error message invalid syntax.
>
>
> ----- Original Message -----
> From: David Kantor <kantor.d@att.net>
> To: statalist@hsphsun2.harvard.edu
> Cc:
> Sent: Thursday, 1 December 2011, 20:51
> Subject: Re: st: Event within dates
>
> The following might work. It is an attempt to fill in some features
> that were needed in your method.
> But it is somewhat brute-force in its approach. It does looping over
> observations (doubly), which is rarely needed.
> There is probably a much better way to do this (involving -by-, for
> one), but this is all I can do at the moment.
> HTH
> --David
>
>
> forval i = 1/ `N' {
>          forval j = 1/ `N' {
>                  replace rs1=1 if drug[`i]==1 & id[`i']==id[`j']  &
> inrange(date[`i'] - date[`j'],-56,56) in `i'
>          }
> }
> [...]

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