On Mon, Nov 10, 2008 at 12:31 AM, Sean Carmody <[EMAIL PROTECTED]> wrote: > The tricks for removing columns specified by name from data frames such as > > x$mycol <- NULL
That only works for data frames since they are based on lists but not for objects like matrix, ts and zoo which are not based on lists. Try this: library(zoo) z <- zoo(cbind(a = 1:2, b = 3:4, c = 5:6)) # all but b z <- z[, colnames(z) != "b"] z z <- zoo(cbind(a = 1:2, b = 3:4, c = 5:6)) # all but b and c z <- z[, ! colnames(z) %in% c("b", "c")] z ______________________________________________ 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.