maybe with sweep: sweep(df, 2, mean(mean(df))/mean(df), "*")
On Tue, Jul 7, 2009 at 5:36 AM, Petr PIKAL <petr.pi...@precheza.cz> wrote: > Hi > > r-help-boun...@r-project.org napsal dne 07.07.2009 10:05:09: > > > > > Dear group: > > sorry for my beginners question, but I'm rather new to R and was > searching > > high and low without success: > > > > I have a data frame (df) with variables in the rows and observations in > the > > columns like (the actual data frame has 15 columns and 1789 rows): > > > > early1 early2 early3 early4 early5 > > M386T1000 57056 55372 58012 55546 57309 > > M336T90 11063 10312 10674 10840 11208 > > M427T91 12064 11956 12692 12340 11924 > > M429T91 4594 3890 4096 4019 4204 > > M447T90 26553 27647 26889 26751 26929 > > > > Now I'm trying to transform each value column-wise to make columns to > all have > > the same mean with: > > > > df * mean(mean(df)) / mean(df). > > > > I just can't get my head around this: mean(df) gives me the correct > column > > means vector, and mean(mean(df)) gives me the correct total mean. The > above > > operation works correctly for individual rows, i.e. if I do > > df[1,]*mean(mean(df))/mean(df) > > a little bit awkward > > t(t(as.matrix(df))*mean(mean(df))/mean(df)) > > or with apply > ttt<-mean(mean(df))/mean(df) > t(apply(df, 1, function(x) x*ttt)) > > There could be some sapply version of it but at present time I can not > find it. > Regards > Petr > > > > > Can someone tell me what I am doing wrong?? > > Thanks! > > > > ______________________________________________ > > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O [[alternative HTML version deleted]]
______________________________________________ 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.
