[rkward-devel] wilcoxon tests

[Thomas Friedrichsmeier]

Hi,

On Monday 19 December 2011, meik michalke wrote:
> Am Donnerstag, 15. Dezember 2011, 18:59:35 schrieb meik michalke:
> > ok, here's a first shot at the merged plugin:
> in the meantime, i merged the new wilcoxon plugin into SVN, it is already
> available in the daily builds, in *addition* to the two existing plugins
> for comparison (the new one lists as "Wilcoxon/Mann-Whitney Tests"). so,
> please compare ;-)
> 
> it also gained a save-object-feature.

That's certainly a good idea.

Wilcoxon tests aren't something that I use every day. And for a minute I was 
confused why "against" was optional. I think that sort of confusion could be 
avoided, if the "Location" parameter was included on the first tab. In fact, I 
think it might be a good idea to change the dialog in line with the new design 
of the t-test dialog.

In another mail you wrote:
> btw, i get
>
>   Package ‘exactRankTests’ is no longer under development.
>   Please consider using package ‘coin’ instead.
> 
> and looked at coin:::wilcox_test(). completely different signature, that
> would need some more work...

Well, in the long term, it will certainly be a good idea to switch to actively 
maintained packages. In this case, the key difficulty seems to be that 
coin::wilcox_test assumes data in long format, instead of wide format. So the 
first step in that direction would be a generic (embeddable) plugin for 
conversion between wide and long...

Regards
Thomas
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