How to plot time against a function with 2 variables

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Yi-Shuan Liu
Yi-Shuan Liu 2021-12-2
回答： Kiran Felix Robert 2021-12-6
1 syms f(x,t) n inf
2 f(x,t)= (2/pi)*symsum((2/n)*sin(n*pi*x)*(1-exp(-0.2*n^2*pi^2*t)),n,1,inf)
3 fplot(f(x,t))
I am stuck on the 3rd line because it produces a blank plot. Can you show how to plot this function against time?

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回答（1 个）

Kiran Felix Robert
Kiran Felix Robert 2021-12-6
Ran in:
Hi Yi-SHuan Liu,
You can use fimplicit to plot multi-variable symbolic functions.
The following is an example,
syms f(x,t)
f(x,t) = x^2 + t^2 -1;
fimplicit(f , [0 1 0 1])

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