On May 23, 2012, at 8:44 PM, Chris Burns wrote:
How do I trim a matrix to exclude columns that have no standard deviation?
mtx[ , as.logical(apply(mtx, 2, sd))] -- David Winsemius, MD West Hartford, CT ______________________________________________ [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 and provide commented, minimal, self-contained, reproducible code.
