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Re: st: first occurrence of the highest value
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: first occurrence of the highest value
Date
Thu, 19 Sep 2013 19:50:21 +0100
The first occurrence of the highest grade is
by ptid: egen first_time = min(time / (wbc_gr == max_wbcgr))
assuming a variable -time-.
Nick
[email protected]
On 19 September 2013 19:38, Marginean, Horia <[email protected]> wrote:
> I am relatively new to Stata and have difficulties solving this problem.
> Below is the status of on ptid that has encountered toxicity grade 1 , 2, 3 -- wbc_gr
> I would like to create a vlb that will identify the first occurrence of the highest value (grade). Vlb max_wbcgr was created -- bysort ptid: egen max_wbcgr = max( wbc_gr ) - to identify the highest grade.
>
> As well as a particular case - to identify the occurrence of a specific grade.
>
> wbc_gr max_wbcgr
> -------------------
> 1 3
> 2 3
> 2 3
> 3 3
> 3 3
> . 3
> . 3
> . 3
> . 3
> . 3
> +-------------------+
>
> Many thanks in advance for your help!
> I am using Stata version 12.1 windows XP
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