Another Newbie Question sorry: I am trying to apply a function a dataframe and could use some help:
Assuming, dim(df) = (10,2) say, I would like to apply a function that looks at each row in turn and returns a list (dim =(10,1)) using the columns as inputs to the function, but with no INDEX stuff that the by() function refers to. For a simple function x+y I know in Mathematica it would be this; Table[df[[i,1]]+ df[[i,2]],{i,1,10}] Of if the function was defined is would read; Table[f[df[[i,1]], df[[i,2]]],{i,1,10}] Thanks for help in advance Glenn [[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.