Create Antenna array which is non-uniformly excited. Plot Radiation pattern, FFT

Problem statement: Create array A=> 13 elements, 'd1' spacing Create array B=> 9 elements, 'd2' spacing

Array Factor to be calculated for: (excitation) 1) Cosine Distribution 2) Cosine squares distribution 3) uniform distribution 4) Cosine over pedestal distribution

Find: Individual array pattern of Array A and Array B. Find multiplication of Array factor of A and B

Only able to do uniform distrubution. Difficulty understanding how current distribution values can be added in array factor formula in matlab.

Do not have antenna/ Phased array toolbox

Code so far:

if true
  for nn1=1:13
x1=(2.*nn1) +1;
y1(nn1)=(cos(((pi.*x1)./2))).^2;
%%end

for nn2=1:9 x2=(2.*nn2) +2; y2(nn2)=(cos(((pi.*x2)./2))).^2; %%end w=conv(y1,y2,'full');

% element spacing d = 0.5;

% 90 degree for braodside, 0 degree for endfire. theta_zero = 90;

An = w; j = sqrt(-1); AF = zeros(1,360);

for theta=1:360

    % change degree to radian
    deg2rad(theta) = (theta*pi)/180;

    %array factor calculation
    for n=1:21
        AF(theta) = AF(theta) + (An(n)).*exp(j.*n.*2.*pi.*d.*(cos(deg2rad(theta))-cos(theta_zero.*pi/180))) ;
 % %  end
    AF(theta) = abs(AF(theta));

%%end

% plot the array factor polar(deg2rad,AF);

t=0:0.01:2*pi; figure plot(t,(20.*log(AF))

end