Re: [R] Subset results of tapply

From: <Richard.Cotton_at_hsl.gov.uk>
Date: Thu, 7 Feb 2008 13:16:44 +0000


> I would like to extract only p.value by performing wilcox.test with
> tapply function.

> > tapply(tmp$pc, tmp$name, wilcox.test)
>
> How can I extract only p.values of above command?

Try this:

wilcoxp <- function(x, ...)
{

    y <- wilcox.test(x, ...)
    y$p.value
}
tapply(tmp$pc, tmp$name, wilcoxp)

Regards,
Richie.

Mathematical Sciences Unit
HSL



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