That plus some subsequent changes to FDistributionTest and credit to Joerg in changes.xml for finding the issue.
On Fri, Sep 26, 2008 at 1:40 PM, Luc Maisonobe <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] a écrit : >> Author: brentworden >> Date: Thu Sep 25 20:09:53 2008 >> New Revision: 699157 >> >> URL: http://svn.apache.org/viewvc?rev=699157&view=rev >> Log: >> MATH-227. fixed F distribution inverse CDF computation for small >> denominator degrees of freedom. > > I would like to propagate this change to the 2.0 branch where most work > happens now. However I don't want to apply it directly using svn > commands because lots of noise has been added by some space characters > being replaced with tab characters everywhere in this commit. > > I tracked the modification to the following change. Could you confirm > the only thing related to bug fix is the replacement of: > > protected double getInitialDomain(double p) { > return getDenominatorDegreesOfFreedom() / > (getDenominatorDegreesOfFreedom() - 2.0); > } > > by: > > protected double getInitialDomain(double p) { > double ret = 1.0; > double d = getDenominatorDegreesOfFreedom(); > if (d > 2.0) { > // use mean > ret = d / (d - 2.0); > } > return ret; > } > > thanks, > Luc > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
