I added my views there. http://code.google.com/p/sympy/issues/detail?id=2042
On Jun 2, 9:34 am, SherjilOzair <sherjiloz...@gmail.com> wrote: > I need review on this style for matrix groundtypes, i.e. having a list > of builtin dtypes, and an other option for misc backends. > Do you think the list of builtins is good enough ? Should I add/remove > stuff ? > > The Matrix will still support seamlessness. I mean, if a Matrix of > Ints comes up, and user wants to take its inverse, then the dtype will > automatically be changed to Rational, and the inverse calculated in > the Rational field. The original Matrix however would remain the same. > ( In accordance to immutability). > > On Jun 2, 9:27 am, SherjilOzair <sherjiloz...@gmail.com> wrote: > > > > > > > > > scipy.sparse implements a dtype kwarg argument, but which currently > > cannot take in arbitrary unknown types though. > > One thing that can be done about this, is to define an interface for > > the dtype. It would be taken for granted that it will have +, *, / > > defined. Checks will be used in algorithms if it has pow, inverse > > defined or not. > > The caller will be provided with a dtype function argument in the > > Matrix constructor. > > > I list some built-in dtypes that sympy has and can provide. With only > > these 6 dtypes, Matrix should suffice for 90% of symbolic matrix > > needs. Possibly, if the caller doesn't want any of these dtypes, then > > he should specify 'other' in the dtype argument. > > > Int, numeric, can employ addition, multiplication, raising to positive > > integral power. > > Rational, numeric, can employ addition, multiplication, division, > > inverse, raising to integral power. > > Real, numeric, can employ addition, multiplication, division, inverse, > > raising to any power. > > Poly (Or one of its internals), symbolic, to support addition, > > multiplication, division by scalar, *not* inverse, raising to positive > > integral power. > > Rational Function, symbolic, to support addition, multiplication, > > division by scalar, inverse, raising to integral power. > > Expr, symbolic, to support addition, multiplication, division by > > scalar, inverse, raising to all powers. -- 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 sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
