On 15 Oct 2004 at 12:01, Luis Rideau Cruz wrote:
> R-help > > I have a martix with missing values( in which I want the sample size > by column) When I : > > apply(matrix,2,length) Hi Try apply(matrix, 2, function(x) sum(!is.na(x))) matrix is reserved word, so it is preferable to use other name for your object. Cheers Petr > > I get the length of the vector regardless of missing values. > I can't pass an argument to length in apply. > > Alternatively I could > > ifelse ( is.na ( matrix [, "columns in matrix " ] ) , 0 , 1) > > Is there any easier way? > > Thank you > > ______________________________________________ > [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 Petr Pikal [EMAIL PROTECTED] ______________________________________________ [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