Basic question on applying a function to each row of a dataframe
On Sun, 8 Jun 2003, peter leonard wrote:
Hi, I have a function foo(x,y) and a dataframe, DF, comprised of two vectors, x & w, as follows : x w 1 1 1 2 2 1 3 3 1 4 4 1 etc I would like to apply the function foo to each 'pair' within DF e.g foo(1,1), foo(2,1), foo(3,1) etc
In R 1.7.0 there is a function mapply() for this sort of thing.
mapply("foo",DF[,1],DF[,2])
-thomas