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)"

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]);

[Image Analyst]

Do you have the Symbolic Toolbox?

>> ver

[Vincent Benet Dela Rosa]

I don't have one, but can I use the free trial?

Answer 1

[Ananya Tewari]

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.