Something like colSums(res < 0), which works for any number of columns. Andy
> From: Frederic renaud > > 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)? > > ______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
