chris1 <[EMAIL PROTECTED]> writes: > I'm using 1.9.0 on Windoze 2k and I created a numeric matrix and used > colnames() to give it some column names, but if I try to select a > column using matrixname$validname I get a null return but if I use > matrixname[,4] it works fine. Looking at the help I think this is > because a matrix is not a recursive structure and I think it's saying > I shouldn't be surprised nor attempt this. > > I'm in the process of transferring all my stats work to R having used > a mixture of SPSS, S and SAS (and snippets of other things) over the > years so sorry if I'm being dumb but this surprised me and I'd love a > kindly explanation as I thought indexing a matrix in this way was > something I did regularly (I think the last time was actually using it > on a dataframe though) and I also think it would be useful and produce > more readable code if I could. > > Can some kindly soul explain?
As Roger indirectly indicated in his response, you probably want to use data frames and not matrices to store your data sets. In the S language the data frame is analogous to the SAS data set. ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
