MATLAB: Function within an integral

integral

Hi,
How can I solve an Integral which looks like:
f(z) = e^A(z)*ln(z), where as A(z) = -z^2
I tried with this code:
fun = @(x) exp(A).*log(x).^2;
A = test_test(x);
q = integral(fun,0,Inf);
function A = test_test(x)
A= -x^2;
end
what am I doing wrong???? PLEASE HELP!!!!!
thanks a lot!!!

Best Answer

This works for me:
test_test = @(x) -x.^2;
fun = @(x) exp(test_test(x)).*log(x).^2;
q = integral(fun,0,Inf)
q =
1.9475
You have to call your function as ‘test_test(x)’ inside ‘fun’, not as ‘A’. (I created an anonymous function for of ‘test_test(x)’ for convenience. If you are using it as a function file, it would work the same way in ‘fun’.)