[R] Passing arguments to with()

[Tymek Wołodźko]

Hi,

I've been wondering how to write a function that will produce results
from multiple tests (eg. paired t-tests) for all or several variables
in some data frame. I'd like it to do t-test for each variable ('x')
in 'data' by 'y'. I'm stuck in here:

function(data,y) {
for (x in names(data)) {
	with(data, t.test(x~y))
}}

How to tell 'with' that 'x' and 'y' are names of columns in 'data'? Or
pass similar arguments?

I probably understand the logic why this is not working, but still
don't know how to make it work.

Thanks in advance for any help!
Timo