[R] Locate first index

[Spencer Graves]

Have you considered "which", as in the following: 
 > a <- rep(1:2, 2)
 > a
[1] 1 2 1 2
 > which(a==1)
[1] 1 3
 > which(a==1)[1]
[1] 1

hope this helps.  spencer graves

Cezar Augusto de Freitas Anselmo wrote:

>Hi, all. I'd like to know if exists a manner to get the first index where
>a condition is attained in a vector. For example,
>
>There is a better solution than 
>
>first.index <- table(subject[corretor==27])[1]
>
>(give me the subject for the first time that corretor is 27)?
>
>Thanks,
>
>========================================
>Cezar Freitas (ICQ 109128967)
>IMECC - UNICAMP
>Campinas, SP - Brasil
>
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