MATLAB: Correlation of an array

correlation of an array.

i've an array in which i've stored different matrices. i want to calculate the correlation between the matrices stored in an array
like:
 A=[ 12 23 12 34    21 32 43 65   65 76  1 23     43 21 54 98 ]
     21 43  2 13    76 87 34 22   89 67 45 88     55 77 54 65
     32 45 56 78    89 87 84 54   22 33 43 54     78 98 97 65      
     67 54 33 44    88 77 66 54   21 15 16 48     90 80 21 66
like if i've array=[A;B;C;D]
i want the correlation between A and B
           correlation between A and C
           correlation between A and D
           correlation between B and C
           correlation between B and D
           correlation between C and D
help me in doing so

Best Answer

Extract the 4 submatrices and correlate all the permutations.
A = fullMatrix(:, 1:4);
B = fullMatrix(:, 5:8);
C = fullMatrix(:, 9:12);
D = fullMatrix(:, 13:16);
% Now correlate:
AB = xcorr2(A, B);
AC = xcorr2(A, C);
AD = xcorr2(A, D);
BC = xcorr2(B, C);
BD = xcorr2(B, D);
CD = xcorr2(C, D);
There is no need for complicated loops when you have this few matrices, and just a few simple lines of code will do it for you.
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