[R] effect sizes for Wilcoxon tests

[Claus Atzenbeck]

On Mon, 14 Nov 2005, Claus Atzenbeck wrote:

> However, for Wilcoxon tests, the formula for effect sizes is:
> r = Z / sqrt(N)
>
> I wonder how I can calculate the Z-score in R for a Wilcoxon test.

Does anyone know how to calculate effect sizes for Wilcoxon tests as
SPSS can do? I wonder if it would be very difficult to do so with R.

Thanks...
Claus