I assume that data$Roman is character. data[order(as.numeric(as.roman(data$Roman))),] should do it. Maybe data[order(as.roman(data$Roman)), ] is enough too.
Gabor On Tue, Feb 12, 2008 at 10:36:50AM +0000, Luis Ridao Cruz wrote: > R-help, > > I have a data frame with one column containing roman numbers > The data are not sorted as : I II III IV V VI VII VIII IX > X XI XII XIII XIV XV > > Using data[order(data$Roman),] does not do the job. > > How can this be done? > > Thanks in advance. > > ______________________________________________ > 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. -- Csardi Gabor <[EMAIL PROTECTED]> UNIL DGM ______________________________________________ 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.
