more generally, if you want to test for some minimum threshold T on the number of zeros, try:
> if(length(which(dart[,1977] == 0)) < T) { # some code to handle the > too-few-zeros-case } On Sep 27, 4:54 pm, Marcio Resende <mresende...@yahoo.com.br> wrote: > I have a matrix 700x2000 which is sampled in each cycle from another matrix > 788x2000 with the numbers 0,1 and 9 > > There is one specific collumn of this matrix, dart[,1977], that usually, > after the samplimg procedure has only 1 and 9 (because the zero frequency in > this collumn is low). > However, when this happens, I want to include an IF conditional in my code. > so basically what i wanted to do was to count the number of zeros in this > collumn to use this information in my conditional: > > something like: > > if (the number of zeros in collumn [,1977] is zero) ... else ... > > I tried to find out indirectly by the rowsum but because of the sampling > procedure the rowsum is not always the same > > Thank you very much > -- > View this message in > context:http://www.nabble.com/Count-number-of-zeros-in-a-collumn-tp25637516p2... > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.