Error using feval on integral

When I type my feval in the Command Window, I get the error:

"Function to evaluate must be represented as a string scalar, character vector, or function_handle object."

function [Ih] = Trapets( f , a , b , N )
a=0;
b=pi;
N=100;

x=a:b/N:b;
f=sin(x^2);
h = (b-a)/N;

f0=feval( f , x );
Ih=h*(sum(f0)/N;
end

[Sulaymon Eshkabilov]

There are a couple of crucial errs in your code and here is the fixed one:

a=0;
b=pi;
N=100;
x=a:b/N:b;
Ih = Trapets(a, b, N, x);
fprintf('Final value is: %f \n', Ih)
function Ih = Trapets(a, b, N, x)    % Note Input vars  
f=sin(x.^2);
h = (b-a)/N;
f0=f;
Ih=h*sum(f0)/N;
end

[Walter Roberson]

No the posted code would fail before that. x is vector and ^2 of a vector is not defined (except for scalar)