[R] count element in column

[Spencer Graves]

      Have you considered

 > sum(res[,1]<0)
[1] 2

      hope this helps.  spencer graves

Frederic renaud wrote:

>Hi,
>I 've a matrix n*1 (thus a column) and I would like to
>count the number of negative element inside.
>Can you help me?
>Thanks!
>
>eg:
> res[,1]= 1
>          -3
>          -1
>
>How obtain the number 2 (number of negative-element)?
>
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