Using output of a function into the integral2 Function - Unrecognized function or variable

Hello,

I'm currently facing an issue with using an output of a function into an integral.

I have attached my code for reference:

P_RAD.m

Unfortunately, for this case, I have to use a function in my code because I need it to plot certain parameters. I understand what the error is saying and why it is saying it. I'm trying to see if there is a workaround for this.

This is the integration I am trying to do: See screenshot attached: P_RAD_Integration.png

The error that I'm facing is shown below.

% Unrecognized function or variable 'U_Rad'.

Error in Patterns (line 200)
P_rad = U_Rad.*sin(theta);

Answer 1

[Walter Roberson]

U_Rad is defined only as the nominal output variable of function Cuts.

You call

    E_Plane(n) = Cuts(loop_theta, phi_E);

    % Specifying the H_Plane cut as an array with theta values and phi_H
    H_Plane(n) = Cuts(loop_theta, phi_H);

so the values assigned internally to U_Rad inside the function are transfered to output variables E_Plane and H_Plane

P_rad = U_Rad.*sin(theta);
P_rad_function = matlabFunction(P_rad);

Besides U_Rad being undefined here: you do not have any symbolic variables, so you cannot construct a matlabFunction

What you need is

syms theta phi
P_rad = Cuts(theta,phi).*sin(theta);
P_rad_function = matlabFunction(P_rad, 'Vars', [theta, phi]);

[Ammar]

Thank You for the quick response @Walter Roberson. This worked!