Correlation on distributed array

I would like to compute autocorrelation using the xcorr function on a distributed array. Would this be possible?

Answer 1

[Heiko Weichelt]

Hi Soumyadipta

Although xcorr does not show up on the methods list of distributed

methods('distributed')

you can use xcorr with distributed inputs.

xcorr is written in MATLAB code and all functions that are used inside support distributed and, therefore, the distributed input literally flows through producing distributed results.

There are quite a few of those functions in MATLAB that we call 'flowthrough' functions.

Modifying the example of xcorr's help text demonstrates the usage:

N = 16;
n = 0:N-1;
a = 0.84;
b = 0.92;
xa = distributed(a).^n;
xb = distributed(b).^n;
[r,lags] = xcorr(xa,xb);
stem(lags,r)

Meaning, you do not need to change any of your code.

I hope this helps. Feel free to get back with additional questions or if you discover any use-cases that do not work right now.

Best,

Heiko