Hi, As there would be a lot of Gray code, it makes sense to have a dedicated sage/combinat/gray_codes/. I would be happy to see Gray codes as I do have one project related to it [1]. Sympy gray codes are implemented in pure Python and only concern subsets. It would be nice in Sage to not use GrayCode only for subsets !!
Best Vincent [1] http://ask.sagemath.org/question/232/iterator-for-conjugacy-classes-of-sn 2013/12/5, P Purkayastha <ppu...@gmail.com>: > You can just hook up the sympy code or use that directly: > http://docs.sympy.org/dev/modules/combinatorics/graycode.html > > > On 12/05/2013 05:52 AM, Nathann Cohen wrote: >> Helloooooo everybody ! >> >> I got an email from a Sage user who wants to enumerate something, and >> I'd need to generate a Gray Code in order to make it faster. And it >> looks like Sage cannot do that from my google searches. I would like to >> list all the subsets of a Set in a "Gray Ordering". Actually, I would >> like to know which bit changes at each step. Aaaaaand well. Is there >> anywhere ? >> >> If it is not in Sage yet 1) that is shameful for us 2) where would you >> like to see it if I implement it ? >> >> I warn you, there will be bitwise C operations somewhere and a Python >> class above to expose it :-P >> >> Thanks ! >> >> Nathann >> >> P.S. : If you answer this message, *PLEASE* also answer on sage-devel. > > > -- > You received this message because you are subscribed to the Google Groups > "sage-combinat-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-combinat-devel+unsubscr...@googlegroups.com. > To post to this group, send email to sage-combinat-devel@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-combinat-devel. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-combinat-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-combinat-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-combinat-devel. For more options, visit https://groups.google.com/groups/opt_out.
