Help on apply() function
You are indeed missing something. x is _one row_ of z, not the index specifying that row. So what you want is: apply(z, 1, function(x)sum(x[1]*1, x[2]*3)) Thanks for including a reproducible example. Sarah
On Tue, Apr 28, 2009 at 9:02 PM, megh <megh700004 at yahoo.com> wrote:
Hi all, can you please clarify me what is the wrong with following codes : set.seed(30) z = matrix(rnorm(10), 5, 2) apply(z, 1, function(x) sum(z[x,1]*1, z[x,2]*3)) However I can not get the desired result. For example, "sum(z[1,1]*1, z[1,2]*3)" gives -5.822442 which is actually correct. Am I missing something in apply() function? Regards, -
Sarah Goslee http://www.functionaldiversity.org