Try this: with(DF, tapply(var2, var1, sum))
On Fri, Sep 18, 2009 at 12:18 PM, MarcioRibeiro <mes...@pop.com.br> wrote: > > Hi listers, > I have a simple doubt... > I need to manipulate the data base as: > > var1 var2 > 7 0.1 > 7 0.1 > 8 0.12 > 10 0.15 > 12 0.18 > 20 0.31 > > I would like to aggregate the equal cases as var1 making the sum of var2... > I would get... > > var1 var2 > 7 0.2 > 8 0.12 > 10 0.15 > 12 0.18 > 20 0.31 > > Thanks in advance, > Marcio > -- > View this message in context: > http://www.nabble.com/Sum-according-observation-tp25510566p25510566.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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.
