[R] count element in column

[Robert Kruus]

How about
sum(res<0)?

-- 
robert.kruus at utoronto.ca
The computer should be doing the hard work.  That's what it's paid to
do, after all.
             -- Larry Wall in <199709012312.QAA08121 at wall.org>

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It is  rumored that on Wed, 5 Jan 2005 08:07:34 -0800 (PST)
Frederic renaud <fren2 at yahoo.com> 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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