On Tue, Dec 10, 2013 at 10:06 AM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > It is bad netiquette to hijack an existing thread for a new topic. Please > start a new email thread when changing topics. > > If your data really consists of what you show, then read.csv won't behave > that way. I suggest that you open the file in a text editor and look for odd > characters. They may be invisible. > > Going out on a limb, you may be trying to read a tab separated file, and if > so then you need to use the sep=”\t" argument to read.csv.
Or something in the data isn't a valid number. Try: as.numeric(as.character(factorthingyouthinkshouldbenumbers)) and if you get any NA values then those things aren't valid number formats. You need as.numeric(as.character(..)) because otherwise as.numeric just gets the underlying number codes for the factor levels. > f=factor(c("1","1","2","three","4","69")) > f [1] 1 1 2 three 4 69 Levels: 1 2 4 69 three > as.numeric(f) [1] 1 1 2 5 3 4 > as.numeric(as.character(f)) [1] 1 1 2 NA 4 69 Warning message: NAs introduced by coercion ______________________________________________ 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.