Question

为什么在matlab中使用xcorr求相关是错误的，急求大神！！！

>> dt=0.004;
t1=[0:dt:100];
A1=1.5;
f1=35;
t2=[0:dt:100];
A2=0.8;
f2=50;
x=A1*sin(2*pi*f1*t1);
B=100;
y=A2*exp(-B*t2.*t2).*sin(2*pi*f2*t2);
[a b]=xcorr(x,y,'unibased');
[a1 b1]=xcorr(x'unibased');
subplot(2,1,1);
plot(b*dt,a);
subplot(2,1,2);
plot(b1*dt,a);
??? Error using ==> xcorr
Input argument is not recognized.

Answer 1

dt=0.004;
t1=0:dt:100;
A1=1.5;
f1=35;
t2=0:dt:100;
A2=0.8;
f2=50;
x=A1*sin(2*pi*f1*t1);
B=100;
y=A2*exp(-B*t2.*t2).*sin(2*pi*f2*t2);
[a, b]=xcorr(x,y,'unbiased');
[a1, b1]=xcorr(x,'unbiased');
subplot(2,1,1);
plot(b*dt,a);
subplot(2,1,2);
plot(b1*dt,a);