Hi Kish, changed in the trunk. Cheers Christian -- Christian Schulte, Professor of Computer Science, KTH, www.ict.kth.se/~cschulte/
-----Original Message----- From: users-boun...@gecode.org [mailto:users-boun...@gecode.org] On Behalf Of Kish Shen Sent: Friday, May 23, 2014 7:40 PM To: users@gecode.org Subject: Re: [gecode-users] AFC decay with global AFC in search engines Hi Christian, To me, legal but not sensible values should be allowed -- some of the variable and value selection strategies implemented by Gecode probably are not very sensible also. In addition, the AFC decay factor can be set to 0 already using afc_decay(0.0), so making the initialision of an IntAFC consistent with that seems reasonable to me. Also, the decay factor for IntActivity can be set to 0, although I guess it might make more sense here, as AFC is only changed when a failure occurs. Cheers, Kish On 23/05/2014 08:49, Christian Schulte wrote: > Hi Kish, > > Yes, a decay factor of zero makes normally no sense. If you want me > to, I can change that. > > Yes, you are right, there is only one global AFC decay factor. > > Cheers > Christian > > Christian Schulte, KTH, web.it.kth.se/~cschulte/ > > -----Original Message----- > From: users-boun...@gecode.org [mailto:users-boun...@gecode.org] On > Behalf Of Kish Shen > Sent: Friday, May 23, 2014 04:13 AM > To: users@gecode.org > Subject: Re: [gecode-users] AFC decay with global AFC in search > engines > > Hi Christian, > > Thanks for this. I decided to change my code to ude INT_VAR_AFC_* with > a decay argument, and then I tried to rerun the test. However, I now > get a Gecode exception "AFC: Illegal decay factor" for a factor of 0.0 > with > > IntAFC afc(*solver, vars, 0.0); > > while previously, I was able to set the decay factor to 0 with > afc_decay(0.0). > > I assume this is because of a > vs >= test for the valid value. Should > this be changed? It seems 0 should be a legal value (even if it is not > too sensible). > > On a related note, from the description in the MPG, I assume there is > only a single AFC decay factor, so setting the decay factor with > > IntAFC afc(*solver, vars, decay) > > will also change the "global" decay factor, i.e. the one obtained by > afc_decay(). Is this correct? > > Cheers, > > Kish > > > > _______________________________________________ > Gecode users mailing list > users@gecode.org > https://www.gecode.org/mailman/listinfo/gecode-users > _______________________________________________ Gecode users mailing list users@gecode.org https://www.gecode.org/mailman/listinfo/gecode-users _______________________________________________ Gecode users mailing list users@gecode.org https://www.gecode.org/mailman/listinfo/gecode-users
