[R] Mann-Whitney by group

R. Michael Weylandt <michael.weylandt@gmail.com> michael.weylandt at gmail.com
Wed Jul 11 00:13:49 CEST 2012

Untested, I think you need to lapply() over thing with some sort of extractor:

lapply(thing, function(x) x[['p.value']])


On Jul 10, 2012, at 3:45 PM, Oxenstierna <david.chertudi at gmail.com> wrote:

> This works very well--thanks so much.
> By way of extension:  how would one extract elements from the result object?
> For example:
> thing<=apply(Dtb[,3:10], 2, function(x) wilcox.test(x~Dtb$Group))
> summary(thing)$p.value
> Does not provide a list of p-values as it would in a regression object. 
> Ideally, I would like to be able to extract the W score and p-value by
> A,B,C,...
> Any ideas greatly appreciated!
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