[R] mann whitney u

David Winsemius dwinsemius at comcast.net
Wed Aug 26 17:20:28 CEST 2009

On Aug 26, 2009, at 7:18 AM, Mcdonald, Grant wrote:

> Dear Sir,
> I am comparing two samples using wilcox.test in R.  Literature  
> appears to describe mann whitney u test as the most appropriate test  
> to use on my data.
> is the wilcox.test function equivalent to mann-whitney u?

When used in its two-sample mode the answer is yes.

> Is there a way to gain the U-value as apposed to the W-value in R?

Answering that question was as simple as going to :

.... typing in mann-whitney u

... and a few clicks.

Try it yourself.

> -- 

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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