Re: Matrix question

[Spencer Graves <spencer.graves@pdf.com>]

With A2 = your matrix, I get your answer from "apply(A2, 2, 
function(x)which(!x)[1])". 

hope this helps.  spencer graves

Chushu Gu wrote:

> Dear All,
>  
> I have a matrix
>  
> T T F T
> T T T T
> T T F T
> T F T F
> F T T F
> T F F T
> F T F F
>  
> What I need is to get the first F location in every column. The result 
> I want is (5,4,1,4), How I use "which" to conquer this problem?
>  
> Chushu Gu