The automatic evalf logic in Function only calls evalf if every argument is a float. It wasn't really designed for functions like besselj where one argument is supposed to be an integer. It should probably be updated to also automatically evalf if one argument is a float and the rest are integers.
Aaron Meurer On Mon, Jun 19, 2023 at 5:29 PM David Bailey <d...@dbailey.co.uk> wrote: > > I wonder if anyone here can explain why some mathematical functions - > e.g. sin and gamma evaluate completely if given a floating point > argument, while others such as besselj(0,0.2) only evaluate completely > if .evalf() is used. > > Is this behaviour intentional? > > Best Wishes, > > David > > -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/5da9b23e-4e62-9ff4-c643-8aa973b379c8%40dbailey.co.uk. -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6Luo60%2BwxYeNMvyb_%2B1qmAt%2BGpiH5f82%3DdCCJJ22mnoHQ%40mail.gmail.com.
