Hi all.
I have a simple expression:
>>> import sympy as sp
>>> a, b, t, t0 = sp.symbols('a b t t0')
>>> expr = a*(t - t0)**3 + b*(t - t0)**2
And I would like to differentiate it with respect to t:
>>> expr.diff(t)
3*a*(t - t0)**2 + b*(2*t - 2*t0)
Why is the constant "2" distributed in the second term?
It seems like an additional step that SymPy does, which doesn't really
"improve" the situation in this case.
Maybe there is a more general advantage that's just not visible in
this simple case?
But if that is so, would it be possible to tell SymPy to skip the distributing?
To be clear, this is the result I was expecting:
>>> expr.diff(t)
3*a*(t - t0)**2 + 2*b*(t - t0)
For context, this question came up in a slightly more complicated
situation: https://github.com/AudioSceneDescriptionFormat/splines/issues/31
cheers,
Matthias
--
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/CAFesC-c%3D2KtL2UGe1KbAX0mYAp7NteQ9i4LNoij8NB0uWQKxdA%40mail.gmail.com.
