OK, thank you.
On Tue, Feb 28, 2012 at 8:03 PM, Christian Schulte <[email protected]> wrote: > No, it does not have it: 3.7.2 is a bug-fix only release (the print-last > thing is a big thing as we rewrote the argument handling completely, that’s > why it did not qualify).**** > > ** ** > > Christian**** > > ** ** > > --**** > > Christian Schulte, www.ict.kth.se/~cschulte/**** > > ** ** > > *From:* [email protected] [mailto:[email protected]] *On > Behalf Of *Wajid Hassan > *Sent:* Tuesday, February 28, 2012 4:39 PM > *To:* [email protected] > *Subject:* [gecode-users] print-last patch**** > > ** ** > > Hi,**** > > ** ** > > Has the new release 3.7.2 for Windows got this as well? I looked and could > not find it here > http://www.gecode.org/doc-latest/reference/PageChange.html**** > > ** ** > > BR/ Wajid**** > > ** ** > > ** ** > > 2012/1/18 Christian Schulte <[email protected]>**** > > Hi, > > I added the command line switch -print-last to the trunk. In case you build > Gecode yourself from source you can use the attached patch to get the > behaviour.**** > > > Christian > > -- > Christian Schulte, www.ict.kth.se/~cschulte/ > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of Josef Eisl**** > > Sent: Tuesday, January 17, 2012 7:02 PM > To: [email protected] > Cc: [email protected] > Subject: Re: [gecode-users] MinimizeScript: Beginners Question > > On 01/17/2012 04:59 PM, Christian Schulte wrote: > > Hi Josef, > > > > Thanks for your observations as far as MPG is concerned. I'll think > > them through and look how to improve. The information being spread out > > can't really be helped much as each location takes a different angle > > and different depth. But I promise I'll think... > > > > Then printing each solution is actually what you want (I guess): > > normally, finding a best solution takes so long that you will have to > > settle for the solution that has been found last after the time is up. > > But maybe there could be an additional switch which would only make > > sense in a best solution search scenario: -print-last where only the > > last solution found is printed, and if a time out is encountered then > > also the last and not necessarily best solution is printed. Would that > make you happy? > > Yes, such an option would be great :). > > Thanks again for your time! > > br > Josef > > > > > Christian > > > > -- > > Christian Schulte, www.ict.kth.se/~cschulte/ > > > > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On > > Behalf Of Josef Eisl > > Sent: Tuesday, January 17, 2012 3:52 PM > > To: [email protected] > > Cc: [email protected] > > Subject: Re: [gecode-users] MinimizeScript: Beginners Question > > > > Hello! > > > > On 01/17/2012 02:31 PM, Christian Schulte wrote: > >> Hi, > >> > >> Please let me take your questions in turn. > >> > >> 1. Changing the relation from strict (that is, "<") to a non-strict > >> (that is, "<=") will typically not work. It would entail that you do > >> not only find all _optimal_ solutions but all solution for each and > >> every cost value! So normally that will be way too many solutions! > >> Try it out with Gist on a small example and you will see that this > >> will make > > things break down. > > > > Ups, my bad. Clearly adding a non strict constraint does not make much > > sense. > > > >> Should I add a tip in MPG that the order must be strict for things to > > work? > > > > Maybe, but I my eyes it is more confusing that > > MinimizeSpace/MinimizeScript return non-optimal solutions, at least > > for a new user. Some other things about MPG and optimization that are not > straight forward in my opinion: > > > > 1. Information is spread over several chapters: > > - 2.5 Best solution search > > - 3.2 Using a cost function > > - 6.3 Support for cost-based optimization > > - 7.4 Search engines > > > > 2. Best Solution Search engine > > It is mentioned in 2.5 and 7.4 but not 3.2 and 6.3 and there are no > > links to the other sections. Maybe it should be stated more clearly > > that BAB or Restart must be used for best solution search. > > > > 3. constrain() > > In 2.5: "Note that every space defines a default constrain() member > > function (to keep the design of models simple). If a model does not > > re-define the > > constrain() member function, the default function will be called which > > throws an exception of type SpaceConstrainUndefined (as this is a > > modeling error)". > > In my eyes the second sentence is not true as OptimizeSpace provides a > > valid constrain(). > > > > These are rather beginner problems than problems of MPG. Gecode is one > > of the best documented free software I've seen. I just want to share > > my experience. > > > >> 2. To find all optimal solutions, I would first find _one_ optimal > >> solution as normal. Then I would find all solutions (starting a new > >> search) where the cost value is equal to the optimal const value. > > > > I see. That makes sense. > > > >> 3. You see that printing "all" optimal solutions with respect to 1. and > 2. > >> does not really make much sense. > > > > Ok using -solutions for optimal solutions does not work. But how about > > printing only the last (optimal if -solutions 0) solution with > > MinimizeScript? > > > >> I hope that helps > > > > Thank you very much for your quick and detailed answers! > > > > Josef > > > > _______________________________________________ > > Gecode users mailing list > > [email protected] > > https://www.gecode.org/mailman/listinfo/gecode-users > > > > > > > _______________________________________________ > Gecode users mailing list > [email protected] > https://www.gecode.org/mailman/listinfo/gecode-users**** > > > _______________________________________________ > Gecode users mailing list > [email protected] > https://www.gecode.org/mailman/listinfo/gecode-users**** > > ** ** >
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