Suppose I define a function f(x) = x**2 and a function g(y) = f(y) + 2*y.
When I type show(g) the output is: y**2 +2*y.
What should I do to have the show output as f(y) + 2*y instead?
Not sure Sage supports that kind of "holding".
Here is a workaround.
Define two versions of the function f,
one "anonymous" and one "explicit":
sage: f = function('f')
sage: ff(x) = x**2
Use the symbolic one to define g:
sage: g(y) = f(y) + 2*y
sage: g
y |--> 2*y + f(y)
When you need it, substitute:
sage: g.substitute_function(f, ff)
y^2 + 2*y
It does the trick, but it's a bit frustrating that there is not a more natural way to this. It is a very important feature when you are dealing with long expressions. But thank you very much anyway!
Asked: 2020-07-27 16:44:25 +0200
Seen: 169 times
Last updated: Jul 28 '20
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