![190715 134831-Figure 1.jpg](https://www.mathworks.com/matlabcentral/answers/uploaded_files/229900/190715%20134831-Figure%201.jpeg)
Correlation between two vectors
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Enrica Brunetti
le 1 Juil 2019
Modifié(e) : Adam Danz
le 15 Juil 2019
How to show the correlation between two vectors? I know I can use the function 'xcorr', but is there a function that shows graphically this correlation?
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Adam Danz
le 1 Juil 2019
Modifié(e) : Adam Danz
le 15 Juil 2019
n = 0:15;
x = 0.84.^n;
y = circshift(x,5);
[c,lags] = xcorr(x,y);
stem(lags,c)
xlabel('lag')
ylabel('r')
or more simply,
plot(lags, c, '-o')
![190715 134831-Figure 1.jpg](https://www.mathworks.com/matlabcentral/answers/uploaded_files/229900/190715%20134831-Figure%201.jpeg)
This shows a maximum correlation at lag -5 which makes sense since we circularly shifted the data by 5 units.
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