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),1,2,3,4,NA,6,7,8,9,10),10,5)
This is a 10x5 matrix containing missing values. All columns except the second contain missing values. I want to delete all columns that contain ALL missing values, and in this case, it would be the first and fourth columns. Any column that has at least one real number would remain. I know I can use "mat[,-1]" to delete the first column, but I have a much larger matrix where it is impossible to tell how many columns contain all missing values and which don't. Is there a function or something else that may be able to help me accomplish this? Thanks in advance. dxc13 -- View this message in context: http://www.nabble.com/Deleting-columns-from-a-matrix-tp23695656p23695656.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
