fig9_3.m

these are the Mtlab functions to plot the figures in the book Communication system (by Haykin)

T=dctmtx2(8);
figure; colormap(gray(256));n=1;
for (i=1:8) 
   for (j=1:8) 
      subplot(8,8,n), 
      imagesc(T(i,:)'*T(j,:)); 
      axis off; axis image; 
      n=n+1; 
   end; 
end;