I would like to use a string as part of a symbolic expression. For instance:
function('P') var('x1 x2 x3 y1 y2 y3')
st = eval('y1,0,1')
sum(P(x1,y1,y2,y3),st)
How could I use st which is a string in the symbolic expression sum?
I want the same result as if I had typed directly:
sum(P(x1,y1,y2,y3),y1,0,1)
I would re-evaluate whether using strings is really what you want to do; probably whatever problem you have can be solved in a better way. Nevertheless, it is possible:
function('P')
var('x1 x2 x3 y1 y2 y3')
st = eval('y1,0,1')
sum(P(x1,y1,y2,y3),*st)
Let's go ahead and give them the "proper" way of doing this which would be simply:
st = (y1,0,1)
sum(P(x1,y1,y2,y3),*st)
The eval there is completely superfluous :)
Asked: 2019-12-05 14:57:48 +0100
Seen: 181 times
Last updated: Dec 05 '19
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Why do you want to eval a string here?