You could just create a new data frame with the result and cbind? On Fri, Nov 12, 2010 at 2:11 PM, albechan <alberto.case...@satt.biz> wrote: > > I have a data frame with three columns. The first one is filled with factors, > the second one with numeric values and the third one is an empty vector. > I need fill the third column with the results of the function > tapply(secondcolumn,firstcolumn,mean) so that I have for each row of the > third column the mean of the second column conditional to the factor element > in the first column. > Thank you very much for your help. > Alb > -- > View this message in context: > http://r.789695.n4.nabble.com/filling-a-vector-with-a-tapply-function-applied-to-another-vector-tp3039271p3039271.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.
