Ondrej Certik wrote: >> Disadvantage -- if one needs to set entries of a Matrix using the >> syntax "A[1, 2] = y" not only at the beginning of the calculaton, but >> also in the middle, then he would have to do: A = Matrix(Array(A)[1,2] >> = y). Of course A[1,2] = y would create an exception saying: "use the >> A = Matrix(Array(A)[1,2] = y)" syntax. > > Advantage -- the vectorization will use Arrays/lists, while Matrix > will be reserved for strictly mathematical thing.
I really like the idea of sympy.Array. We should also resolve the somewhat ad-hoc naming/call signature of functions that create special matrices in the process, consider: numpy: zeros(), ones(), accepting arbitrary shape tuple sympy: zeronm( n, m ), one( n ) This is not good, and easy to fix even now, at least for the 2D matrices (or should I say arrays?). I do not propose removing zeronm and one, of course, as it would probably break a lot of code, but implementing also zeros and ones. The former may print some future deprecation warning, as usual. r. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
