[R] count element in column

[Anne]

x<-c(-3. -4.7, -.005, 1, 9)
> length(x[x<0])
[1] 3

Anne



----- Original Message ----- 
From: "Frederic renaud" <fren2 at yahoo.com>
To: <r-help at stat.math.ethz.ch>
Sent: Wednesday, January 05, 2005 5:07 PM
Subject: [R] count element in column


> 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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