Changing objects RCS as a function of azimuth and elevation angle

I'm trying to use the SAR simulation (which you can conveniently run by just typing openExample('phased/SyntheticApertureRadarImageFormationExample') in the command window) to model a Synthetic Aperture Radar that visualizes objects whose reflectivity (RCS) changes. When I changed the phased.RadarTarget() object I saw that when I instantiated it to simulate signal reflection there were problems with the parameters. It expected 3 parameters. Once I learned what they were I was getting an error that the first parameter had to be a struct. I changed my complex matrix (which represents an incident signal) to a struct, but then an error popped up saying that I had to change it to a double. The code below simulates the same error I'm getting without having to run the simulation.

% General_Playground.m
clear;
clc;

% Random matrices (Scattering)
a = randi([0,1],[181,91]);
b = randi([0,1],[181,91]);
f = randi([0,1],[181,91]);
d = randi([0,1],[181,91]);

% Reference angles
az = input('Input the azimuth angle');
el = input('Input the elevation angle');

% Generate complex numbers
for ix = 1:2002
    for iy = 1:3
        q = randi([0,15]);
        w = randi([0,15]);
        r(ix,iy) = q + w*1i;
    end
end

% Create target
target = phased.RadarTarget('EnablePolarization',true,'ScatteringMatrix',[a(az,el),b(az,el);b(az,el),f(az,el)] ...
        ,'OperatingFrequency',600e6);

% Target reflection
y = target(r,[45,0],azelaxes(180,0));
disp(y(1:10));