Message-ID: <Pine.A41.4.44.0306090646190.67638-100000@homer36.u.washington.edu>
Date: 2003-06-09T13:47:20Z
From: Thomas Lumley
Subject: Basic question on applying a function to each row of a dataframe
In-Reply-To: <Law11-F101oZolmRBaY00009f20@hotmail.com>
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