On 5/30/11 2:54 PM, Nathanael Costa wrote: > Hi, > > I downloaded the version 3.0 and I noted that the Wilcoxon Signed Rank > returns the maximum W. But anywhere I read about this test says that > the minimum W should be returned. Am I missing something? > > Another question is why do not ignore the rank when differences are zero? > > Thanks in advance, > Thanks for the feedback. I am not sure I understand exactly what you mean, though. By "the minimum W" do you mean the minumum of W- and W+ (per javadoc of the wilcoxonSignedRank method)? I am sorry, but I don't follow the second question either.
The implementation follows the algorithm referenced in the calculateExactPValue method. This is new code, so it is quite possible that we have missed something or are using non-standard definitions. The test cases (look in src/test) include validation of the exact p value computation in one case against R. It would be great if you could provide a test case or external reference showing us what is incorrect / nonstandard about the implementation. Thanks! Phil --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
