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how to append to a symbolic expression in a loop?

asked 2019-04-27 22:18:13 +0200

stockh0lm gravatar image

This must be super basic, but i don't get how to do the classic

for i in list:
    expression = expression + i

symbolically. I want to add new terms to the expression, and the "==" notation does not mash well with that.

An .append() method would make sense, but i was not able to find one.

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the = is the solution. I had defined expression as a symbolic variable and then it didn't work.

can you please move this to a proper answer so i can upvote it?

stockh0lm gravatar imagestockh0lm ( 2019-04-27 23:11:59 +0200 )edit

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answered 2019-04-27 22:31:18 +0200

vdelecroix gravatar image

Could you clarify your question? The following code works

sage: expression =
sage: for i in [SR.var('x'), SR.var('y'), SR.var('z')]:
....:     expression = expression + i
sage: expression
x + y + z
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Asked: 2019-04-27 22:18:13 +0200

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Last updated: Apr 27 '19