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> How about this? > length(res[res < 0, 1]) > HTH, Andy > or simply sum(res<0) . For R beginners: This works because the logical res<0 vector is automatically coerced to a numeric vector of 0's and 1's by sum(). -- Bert Gunter Genentech Non-Clinical Statistics South San Francisco, CA > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] Behalf Of > Frederic renaud > > Sent: Wednesday, January 05, 2005 11:08 AM > > To: [email protected] > > 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)? > > > > ______________________________________________ > > [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 > ______________________________________________ [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
