There's no column in FD named SUBJECT In your example data it's named SUBJCET, not the same.
It's also possible that R didn't automatically recognize the first row as column names, and you need to add header=TRUE to the read.csv() command. In either case, you can see the actual column names of your data frame with: colnames(FD) Sarah On Mon, Jan 23, 2012 at 8:11 AM, Sri krishna Devarayalu Balanagu <balanagudevaray...@gvkbio.com> wrote: > Hi all, > > A small problem raising. > Suppose the follow raw data is stored in a csv file. And the error is coming > as NULL with the following code. > Can you please help? > Thank you in advance. > > SUBJCET > > 9999 > > 9999 > > 9999 > > 9999 > > 9999 > > 1Ito > > 1Ito > > 1Ito > > 1Ito > > 1Ito > > 1Ito > > 9999 > > 9999 > > 9999 > > 9999 > > > read.csv("Noname3.csv") -> FD > FD$SUBJECT > NULL > > Regards > Devarayalu > -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.