Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: Event within dates


From   David Kpento <dkpento@yahoo.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Event within dates
Date   Fri, 2 Dec 2011 08:20:42 +0000 (GMT)

I am sorry the new approach did not work.

Thanks for any help.

David Kpento

PhD Student,

University of Ghana

Accra/Ghana


----- Original Message -----
From: David Kantor <kantor.d@att.net>
To: statalist@hsphsun2.harvard.edu
Cc: 
Sent: Thursday, 1 December 2011, 23:22
Subject: Re: st: Event within dates

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'
>          }
>}
>[...]

*
*   For searches and help try:
*  http://www.stata.com/help.cgi?searchhttp://www.stata.com/support/statalist/faqhttp://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/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index