Re: [R] Count number of zeros in a collumn

2009-09-27 Thread William Dunlap
> -Original Message- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Murat Tasan > Sent: Sunday, September 27, 2009 4:27 PM > To: r-help@r-project.org > Subject: Re: [R] Count number of zeros in a collumn > > more genera

Re: [R] Count number of zeros in a collumn

2009-09-27 Thread Murat Tasan
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 wrote: > I have a matrix 700x2000 which is sampled in each cycle from

Re: [R] Count number of zeros in a collumn

2009-09-27 Thread milton ruser
Hi Marcio, How about if (min(dart[,1977])==0)... cheers milton On Sun, Sep 27, 2009 at 4:54 PM, Marcio Resende 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[,197

[R] Count number of zeros in a collumn

2009-09-27 Thread Marcio Resende
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