It is not uncommon to want to coarsen a factor by grouping levels
together. I have found one way to do this in R:
> sites
[1] F A A D A A B F C F A D E E D C F A E D F C E D E F F D B C
Levels: A B C D E F
> regions <- list(I = c("A","B","C"), II = "D", III = c("E","F"))
> library(Epi)
> region <- Relevel(sites,regions)
> region
[1] III I I II I I I III I III I II III III II I
III I III
[20] II III I III II III III III II I I
Levels: I II III
However this seems like using a sledgehammer to crack a nut. Can someone
suggest a simpler way to do this task?
Murray Jorgensen
--
Dr Murray Jorgensen http://www.stats.waikato.ac.nz/Staff/maj.html
Department of Statistics, University of Waikato, Hamilton, New Zealand
Email: [EMAIL PROTECTED] Fax 7 838 4155
Phone +64 7 838 4773 wk Home +64 7 825 0441 Mobile 021 1395 862
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