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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