Correlation between two vectors

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Enrica Brunetti
Enrica Brunetti 2019-7-1
编辑： Adam Danz 2019-7-15
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
Adam Danz 2019-7-1
编辑：Adam Danz 2019-7-15
Directly from matlab documentation,
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
This shows a maximum correlation at lag -5 which makes sense since we circularly shifted the data by 5 units.

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