Unwanted automatic evaluation comes up fairly frequently on the listhost. It's on our radar but there hasn't been much movement on the issue lately. It requires a concerted effort by someone with some time.
> is there wider interest in such a feature? Absolutely. On Wed, Feb 5, 2014 at 2:54 PM, Freddie Witherden <fred...@witherden.org>wrote: > Hi all, > > In SymPy is there any way of stopping orthogonal polynomials from > automatically simplifying down to concrete expressions? So for: > > sy.jacobi_normalized(2, 0, 1, x) > > to give: > > sqrt(6)/3*jacobi(2, 0, 1, x) > > as opposed to: > > sqrt(6)*(5*x**2/2 - x - 1/2)/2 > > I have a use-case where it is highly desirable for polynomials to be > kept in the above form (as it permits more efficient/numerically stable > evaluations later on). Other than keeping n as a Symbol is this > currently possible? If not---and I suspect, from a quick glance over > the source code that it isn't!)---is there wider interest in such a > feature? > > Regards, Freddie. > > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
