How to take function as an input and differentiate it( str2func not working) ?

syms x;

y = str2func(input('Enter one variable wquation, e.g @(x)2*x - 3: ', 's'));

disp(diff(y))

In this example I have tried to write a function input from user where the diff function will differentiate the function. But the str2func does not work here. Where us the problem I can not find. Can anyone please help me?

I just want to take input from user a function and differentiate it

Answer 1

[Voss]

Use str2sym instead of str2func

syms x;
% y = str2sym(input('Enter one variable wquation, e.g @(x)2*x - 3: ', 's'));
y = str2sym('@(x)2*x - 3')

y = 

disp(diff(y))

2