Hi r-help-boun...@r-project.org napsal dne 10.06.2010 15:56:06:
> Hello everyone, > > I have a matrix of over 40000 line and about 30 columns. Matrix or data.frame? > > For my analysis I would like to add another column with ascending numbers > (column header should be "order", and than 1,2,3,4 ....the end of the > matrix). If data frame DF DF$order <- 1:nrow(DF) in case of matrix mat mat <- cbind(mat, "order"=1:nrow(mat)) Regards Petr PS. order is built in function so it is not especially wise to use it as a name for some object/column > During my analysis I reorder them ( due to merge commands by a different > column). > > How do I add such a column in an ascending order (or descending for what it > matters)? > > THX > > Assa > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. ______________________________________________ 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.
