On Thu, Jan 26, 2012 at 12:09 PM, Jason Grout <jason-s...@creativetrax.com> wrote: > On 1/26/12 1:57 PM, Tom Boothby wrote: > >> It would be nice to be able to specify a type. Perhaps >> >> R.[1,2,3;2,3,4] -> Matrix(R,[[1,2,3],[2,3,4]]) >> >> or perhaps even >> >> R[1,2,3;2,3,4] > > > Another option would be: > > [QQ: 1,2,3; 4,5,6] > > or, as Robert suggests: > > [1,2,3; 4,5,6, base_ring=QQ] -- but then it looks like base_ring=QQ is > another element.
My thoughts were that keyword arguments after the final semicolon would get passed as keyword arguments to the matrix constructor, so one could do [1,2,3; 4,5,6; sparse=True, base_ring=QQ, ...]. R[...] or [R: ...] aren't bad ideas either (though the former gets messy to "pick out the R" which may be an arbitrary expression). > As a side note, I guess if QQ^2 gives the vector space over QQ, then > QQ^(2,3) should give the matrix space over QQ of 2x3 matrices (I don't think > it does now, but that would be nice if it did). +1 -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
