Actually, there might be an easier way to do. Have a look at the Gecode source file gecode/kernel/rnd.hpp. If you implement a random number generator that has the very same interface (just replace Support::RandomGenerator by your own random number generator) you can use that instead for the normal branchers.
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 Guido Tack Sent: Friday, April 11, 2014 10:12 AM To: negate...@gmail.com Cc: users@gecode.org Subject: Re: [gecode-users] Random Distributions (INT_VAL_RAND) Have a look at Sect. 8.8 in MPG, it shows how to implement a custom value selection strategy. Cheers, Guido On 11 Apr 2014, at 5:38 pm, negate...@gmail.com wrote: > Are there any implementations for different random distributions for integer *value* selection, besides the uniform distribution supported by INT_VAL_RND() ? For Eg. I'd like the values to be distributed based on a normal distribution or maybe a logarithmic distribution. > If not, can you point me to some code which would be a good starting point to implement such a value selection method, as I'm not sure where the implementation for INT_VAL_RND exists ? Is it in gecode/int/branch/val-sel-commit.cpp ? > There was a thread in May 2009 titled "How to set an arbitrary RandomGenerator for randomized branching", but not sure if it ever got implemented ? > > Thanks, ~az > _______________________________________________ > 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
