Try this: sweep(as.matrix(df), 2, as.matrix(df[1,]))
On Tue, Jan 25, 2011 at 7:20 AM, Vincy Pyne <vincy_p...@yahoo.ca> wrote: > Dear R helpers > > I have a dataframe as > > df = data.frame(x = c(1, 14, 3, 21, 11), y = c(102, 500, 40, 101, 189)) > > > df > x y > 1 1 102 > 2 14 500 > 3 3 40 > 4 21 101 > 5 11 189 > > # Actually I am having dataframe having multiple columns. I am just giving > an example. > > I need to subtract all the rows of df by the first row of df i.e. I need to > subtract each element of 'x' column by 1. Likewise I need to subtract all > elements of column 'y' by 11. Thus I need an output like > > > df_new > x y > 1 0 0 > 2 13 398 > 3 2 -62 > 4 20 -1 > 5 10 87 > > As I had mentioned above, I have number of columns in reality and thus I > can't use the command > say > > df_new = data.frame(x = df$x-df$x[1], y = df$y-df$y[1]) > > Kindly guide > > Thanking you all in advance > > Regards > > Vincy > > > > [[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. > > -- 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.
