On 30 jun, 22:45, Ryan Hinton wrote:
> Thanks for the reply! That's a perfect example of what I am doing
> now. Can I go one level higher and define my generating function as a
> product of terms *while leaving the actual degrees, coefficients, and
> even the number of dimensions symbolic*.
I
I may have the answer: no, not directly.
Sage includes Pynac, which wraps GiNaC. GiNaC has indexed
expressions, which just might do exactly what I want. (I don't have
ginsh running to test differentiation.) But it looks like indexed
expressions are not hooked up for use in Sage. I am posting t
Thanks for the reply! That's a perfect example of what I am doing
now. Can I go one level higher and define my generating function as a
product of terms *while leaving the actual degrees, coefficients, and
even the number of dimensions symbolic*. So instead of getting
something like
(5*x0*x1 +
> Can I do this in Sage?
Sure. Here you have some tips:
{{{id=1|
#Create n variables with names x1, x2 ... xn
#and store them in a list vs
n = 5
vs = var(' '.join('x%d'%j for j in range(5)))
vs
///
(x0, x1, x2, x3, x4)
}}}
{{{id=6|
def pot(vs,ds):
return prod(v^d for v,d in zip(vs,ds))
pot(
