Hi all,
I wrote a simple function that gives me multiple t.test results
according to a subset variable and am wondering whether or not I
reinvented the wheel. Observe:
t.test.sub <- function (formula, data, sub, ...)
{
for(i in 1:max(sub))
{
print(t.test(formula, data = subset(data, sub == i), ...))
}
}
Is there already a similar function in some package?
Thanks,
Matthew Dubins
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