Can someone please help?

Answer 1

[Star Strider]

There are some problems.

First, ‘pv’ is not a function of ‘phi’, at least as written.

Second, use element-wise operations for multiplication and exponentiation (and division, however there are no division operations in ‘pv’).

This runs without error:

pv = @(R,theta,phi) (5*R*10*-3).*R.^2.*sin(theta);
Q = integral3(pv,0,2*pi,0,pi,2,3)

See the documentation on Array vs. Matrix Operations to understand element-wise operations.