Error using feval on integral
1 view (last 30 days)
Show older comments
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
2 Comments
Sulaymon Eshkabilov
on 20 Jun 2021
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
on 20 Jun 2021
No the posted code would fail before that. x is vector and ^2 of a vector is not defined (except for scalar)
Answers (0)
See Also
Categories
Find more on Semiconductors and Converters in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!