How to write the autocorrelation of a sequence x(n)

How to write the autocorrelation of a sequence x(n)

[Marwan Malaeb]

No problem I found it. it is the dsp.autocorrelater.

Answer 1

[Image Analyst]

If you have the Signal Processing Toolbox,

r = xcorr(x, x);

[Marwan Malaeb]

this may return the correlation coefficients. I want the autocorrelation.and for a certain value to M.