Question

MATLAB互相关程序

clc
A=load ('0.2.txt');
t=[0.005:0.005:50];
a=A(1:10000,1);
a=-0.21229+0.05394.*a;
m=mean(a);
x1=a-m;

b=A(1:10000,2);
b=-0.10254+0.05321.*b;
n=mean(b);
x2=b-n;

corrxy=xcorr(x1,x2,'coeff');

subplot(3,1,1),plot(t,x1);
subplot(3,1,2),plot(t,x2);
subplot(3,1,3),plot(t,corrxy);
我想求得x1和x2的在时域范围内的互相关函数
可程序老是提示最后一步错误
请高手指点

Answer 1

N点序列的相关函数是一个2N-1长的序列，长度和t不一致
subplot(3,1,3),plot(corrxy);title('互相关函数')