www.pudn.com > dsp_lms.rar > practise.m

t=-3:0.01:3; 
y1=square(2*pi*t,80); 
y2=sawtooth(2*pi*t,0.5); 
y3=sinc(2*pi*t); 
x=-12:0.01:12; 
y4=diric(x,4); 
y5=diric(x,5); 
figure(1) 
subplot(2,2,1) 
plot(t,y1,'r--',t,y2,'b--') 
xlabel('t'); 
ylabel('y1=square(2*pi*t,80)----------y2=sawtooth(2*pi*t,0.5)') 
legend('\ity=fangbo','\ity=sanjiaobo'); 
title('fangbo  he  sanjiao  qu xian '); 
grid on; 
subplot(2,2,2) 
plot(t,y3,'k'); 
grid on; 
 
subplot(2,2,3); 
plot(x,y4,'') 
grid on; 
subplot(2,2,4); 
plot(x,y5,'g'); 
grid on; 
hold on; 
figure(2) 
%a=0.4*randn(1,20)+3; 
%b=0.8*randn(1,30)+1; 
[A,B]=meshgrid(-3:0.1:3); 
C=peaks(A,B); 
m=ones(size(C)); 
surfc(A,B,C,m) 
grid on