You're not only removing a row of data, you are invoking the default behavior of subset, which is to collapse the subsetted result to the smallest possible type, which in this case is a vector. Vectors have no rows, and thus no row names.
You need the drop=FALSE argument, as in ENV <- ENV[-1, , drop=FALSE] Sarah On Fri, Feb 5, 2010 at 9:44 AM, Euan Reavie <euan.rea...@gmail.com> wrote: > I find this odd because it doesn't appear to happen in larger datasets. I > have the following data set ENV with the first column set as row.names: > >> ENV > TPlog > 001S29H 0.601 > 002S42H 0.602 > 003S43S 0.779 > 004S43S 0.702 > 005S51H 0.978 > 006S52P 2.718 > > If I apply > ENV <- ENV[-1,] # remove first row of data (right?) > ...ENV comes back as: > > [1] 0.602 0.779 0.702 0.978 2.718 > > So I am losing the row name info. I also notice that, if the first two > values in the TPlog column are the same, both values are removed! What's > going on, and why does this same thing not happen in more complex datasets > with more than one column of values? > > Many thanks - Euan. -- 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.