[R] Problem with "Cannot compute correct p-values with ties"

[Karl Ove Hufthammer]

On Wed, 02 Dec 2009 16:52:23 +0800 Zhijiang Wang 
<ivorytower at emails.bjut.edu.cn> wrote:
>    Dear All,
>    1. why did the problem happen?
>    2. How to solve it?

A good start would be to follow the advice at the bottom of every 
posting on this mailing list:

PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

-- 
Karl Ove Hufthammer