this is my coding for beamplot. i have problem with polar plots. it is not working well. can anyone help me with this one. thanks in advance.

close all;clear all;

freq=400e6;%input('frequency (e.g 900e6 for 900MHz):');

lambda=3e8/freq

d_ratio=2;%input('ratio of lambda/d:');

d=1/2;%lambda/d_ratio;

M=7;%input('M, number of elements:');

phi_s=50;%input('angle of interest(-90 to 90):');

u_s=(d/lambda)*sin(phi_s*pi/180);

x=5; %step up for plotting graph

SS=zeros(M,1);

ZZ=zeros(1,M);

YY=zeros(1,(180/x));

s=exp(-i*2*pi*u_s*(0:(M-1)))/sqrt(M); 
s=s';
c_mf=s';

J=0;
for angle=-180:x:180

      J=J+1;
      W=zeros(1,M);
      u_s=(d/lambda)*sin(angle*pi/180);
      SS=zeros(M,1);

      for I=1:M
      SS(I,1)=exp(-i*2*pi*u_s*(I-1))/sqrt(M); 

      end

YY(:,J)=c_mf*SS;

end
     YY=abs(YY);

       YY=YY/max(YY);
  J=0;
  angle=-180:x:180;

figure(1),close all

plot(angle,YY,'m'), axis([-90 90 0 1]),hold on;

figure(2);
polar(angle,YY,'m');*%this doesn't work well, the polar graph is wrong *

[Walter Roberson]

You will need to describe what you want the plot to look like, and what you see instead.