Perhaps this? X[, apply(X, 2, sd) < 1e-10]
HTH, Jorge.- On Wed, May 23, 2012 at 8:44 PM, Chris Burns <> wrote: > How do I trim a matrix to exclude columns that have no standard deviation? > > Thanks, > > Chris > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
