On Wed, Apr 20, 2022 at 6:37 AM Jonathan Gutow <gu...@uwosh.edu> wrote: > > > On Apr 19, 2022, at 10:48 PM, Andre Bolle <andrebo...@gmail.com> wrote: > > Here's what I did. You will notice that the second derivative couldn't see > the 'x', which had been replaced by psi. > > Yes, that is a “feature” of sympy, which assumes that all symbols that do not > have an explicit dependence on the variable of differentiation are constants. > Most of the time that works well. You can get around that by specifying that > psi is a function of x. See the sympy documentation on functions. I have been > fiddling with how to make it take more general derivatives, but need to > figure out a definition of an infinitesimal that will function consistently > within the sympy environment.
If you're making a custom object, you can redefine various differentiation methods to make it work correctly with derivatives (the docs for this aren't great right now, but I hope to improve that soon). Aaron Meurer Aaron Meurer > > > I do like the equation annotation. (eq1), (eq2), (eq3), etc. Nice. > > Glad you like it. I sometimes collapse the code blocks. This then leaves you > with the results of each step as might be provided in a traditional > derivation. You can also pretty it up with comments in markdown cells between > the each step. > > Jonathan > > -- > 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/615CE6C5-8B01-4ED3-8D3E-3F7E16C1B5D1%40uwosh.edu. -- 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%3D6%2B0t3c63fvdZWERp_ytO7SVfB2ng_fWy8EiBHH7YnQm7g%40mail.gmail.com.
