On Wed, Feb 20, 2008 at 6:02 PM, Ronaldo Reis Junior <[EMAIL PROTECTED]> wrote: > Hi, > > How to order the levels os factor not by alphabetic order but by mean of Y. > Somethink like this: > > I have this alphabetic order: > > > levels(pH) > [1] "alto" "baixo" "medio" > > the order by mean os yvar is: > > sort(tapply(Riqueza,pH,mean)) > baixo medio alto > 11.56667 20.00000 26.80000 > > How to make the levels of pH ordered by this mean to the result to see > somethink like this: > > > levels(pH) > [1] "baixo" "medio" "alto"
Have a look at ?reorder Hadley -- http://had.co.nz/ ______________________________________________ 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.
