This code that I have tried always shows an error, I have seen that it works on youtube but not for me. It say "Error using sym>convertChar (line 1546)"

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Vincent Benet Dela Rosa
回答： Ananya Tewari 2021-8-4
syms x t s X F
F=laplace('diff(x(t),t,t)+7*diff(x(t),t)+10*x(t)=20',s);
F=subs(F,{'laplace(x(t),t,s)'},{X});
F=subs(F,{'x(0)','D(x)(0)'},{5,3});
X=solve(F,'X');
x=ilaplace(X);
pretty(x);
ezplot(x,[0 10]);

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回答（1 个）

Ananya Tewari
Ananya Tewari 2021-8-4
Hi,
The laplace function requires symbolic expression as an input. You can use str2sym() to convert string into symbolic equations.
Refer to this question asked by another user.

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