fg_05_06.m

英文书《Digital Signal Processing with Examples in MATLAB》附带的MATLAB实例

% fg_05_06  Window functions.
N=31; beta=2*sqrt(2)*pi;
name=str2mat('Rectangular (Boxcar)','Hamming','Blackman','Kaiser');
sp_fig(1);
w=[boxcar(N),hamming(N),blackman(N),kaiser(N,beta)];
clr=['r' 'b' 'g' 'c'];
for i=1:4
   subplot(2,2,i);
   axis([0 N 0 1.1]);
   h=stem([0:N-1],w(:,i),'o');
   set(h,'color',clr(i));
   grid;
   set(gca,'fontsize',16);
   if(i==3|i==4)
      xlabel('index k');
   end
   if(i==1|i==3)
      ylabel('w_k');
   end
   ht(1)=text(10.5-8*fix(1/i),1.12,name(i,:));
   set(ht,'fontsize',16);
end