Argh.... log-likelihood should approach the percentage of INcorrect answers (negated).
On Tue, May 31, 2011 at 7:49 AM, Xiaobo Gu <[email protected]> wrote: > Page 228 of version 7 of Mahout in Action says : > > Log-likelihood has a maximum value of zero and no bound on how far > negative it can go. For highly accurate classifiers, the value of > average log-likelihood should be close to the average percent correct > for the classifier times the number of target categories. > > Average percent correct times the number of target categories is more > than 0, while Log-likelihood is always less than 0, then is the above > statement correct ? > > > > On Tue, May 31, 2011 at 10:45 PM, Xiaobo Gu <[email protected]> > wrote: > > Does it mean the percent of records that the model has correctlly > > predicted the target on the validate protion of the data set, then it > > should be between 0 and 1, and the bigger the better performance of > > the model ? > > > > Regards, > > > > Xiaobo Gu > > >
