Why the last row is wrong？

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zhenyu zeng
zhenyu zeng 2019-5-6
回答： zhenyu zeng 2019-5-6
t=sym('t','positive')
ut=str2sym('Heaviside(t)-Heaviside(t-1)')
ht=t*exp(-t)
yt=int(subs(ut,t,tao)*subs(ht,t,t-tao),tao,0,t)
yt=collect(yt,'Heaviside(t-1)')
What can I do to correct the last row?
My product is Matlab R2018
Thanks.
  1 个评论
Jan
Jan 2019-5-6
If you mention, that there is an error in the last line, please post the error message. It is useful to provide as much information as possible.

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回答（1 个）

zhenyu zeng
zhenyu zeng 2019-5-6
Wrong： sym.charToFunction (line 26)
Invalid variable name.
Wrong： sym/collect (line 40)
x = sym.charToFunction(x);

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