Hi,
You can define a functional using symbolic variables and functions by first creating a placeholder for any function of (x) using “syms”. Then set up a generic integral functional that can accept any function as input. To evaluate it, assign a specific function and use the “subs” function:
You can refer to the following code for your reference:
syms f(x);
F = int(f, x, 0, 1);
%Give desired function definition
f(x)=x^2;
F1 = subs(F);
I am also attaching official MathWorks documentation link on “syms” and “subs” for your reference:
Hope this will be helpful!
