Re: [R] Deleting columns from a matrix

Thanks, both of these methods work great! Dimitris Rizopoulos-4 wrote: > > one way is: > > mat <- > matrix(c(rep(NA,10),1,2,3,4,5,6,7,8,9,10,10,9,8,NA,6,5,4,NA,2,1,rep(NA,10),1,2,3,4,NA,6,7,8,9,10), > > 10, 5) > ind <- colSums(is.na(mat)) != nrow(mat) > mat[, ind] > > > I hope it helps. >

Re: [R] Deleting columns from a matrix

Dear dxc13, Here is another way: index <- apply(mat, 2, function(x) !all(is.na(x))) mat[ , index] HTH, Jorge On Sun, May 24, 2009 at 12:53 PM, dxc13 wrote: > > useR's, > I have a matrix given by the code: > mat <- > > matrix(c(rep(NA,10),1,2,3,4,5,6,7,8,9,10,10,9,8,NA,6,5,4,NA,2,1,rep(NA,10)

Re: [R] Deleting columns from a matrix

one way is: mat <- matrix(c(rep(NA,10),1,2,3,4,5,6,7,8,9,10,10,9,8,NA,6,5,4,NA,2,1,rep(NA,10),1,2,3,4,NA,6,7,8,9,10), 10, 5) ind <- colSums(is.na(mat)) != nrow(mat) mat[, ind] I hope it helps. Best, Dimitris dxc13 wrote: useR's, I have a matrix given by the code: mat <- matrix(c(rep(NA,1