Like
i = Symbol('i')
summation(x + i, (i, 0, 4))
If you are looking for something that generates a summation
automatically, I don't think such a thing exists.
Aaron Meurer
On Fri, Aug 1, 2014 at 10:54 PM, Nova Munch <[email protected]> wrote:
> hello,
>
> 2 questions related to reducing to summation using sympy:
>
> 1) lets say i have an expression (x) + (x+1) + (x+2) + (x+3) + (x+4)
> is there any function to help me simplify/reduce it to become summation of x
> over 0 to 4?
>
> along the same line:
>
> 2) lets say i have an expression (x[0]*y[0]) + (x[1]*y[1]) + (x[2]*y[2]) +
> (x[3]*y[3]) + (x[4]*y[4]),
> is there any function to help me simplify/reduce it to become summation of
> x[i]*y[i] over 0 to 4?
>
> perhaps it can't be done in the raw form above, maybe i need to use some
> annotations or use certain types of special symbols?
>
> NM
>
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