n=6; key_size=3; i=5;
X = rand([n,key_size,6]);
idx = [1:i-1 i+1:n];
X (idx, :, :) = X (idx, :, :)./sum(X (idx, :, :), 2);
X
X =
X(:,:,1) =
0.1963 0.2355 0.5682
0.4084 0.3829 0.2087
0.4225 0.2156 0.3619
0.6109 0.1880 0.2010
0.3553 0.0219 0.1098
0.0393 0.7273 0.2334
X(:,:,2) =
0.4083 0.3940 0.1977
0.3497 0.2938 0.3565
0.4196 0.5791 0.0013
0.6651 0.1788 0.1561
0.7057 0.9660 0.4752
0.3116 0.1548 0.5336
X(:,:,3) =
0.1459 0.7574 0.0967
0.3566 0.5568 0.0866
0.3424 0.3153 0.3423
0.0998 0.5528 0.3474
0.4512 0.6269 0.0229
0.1695 0.4982 0.3323
X(:,:,4) =
0.1744 0.2141 0.6114
0.4465 0.4234 0.1301
0.1581 0.2629 0.5790
0.4688 0.5284 0.0028
0.7126 0.7236 0.9397
0.2849 0.2578 0.4573
X(:,:,5) =
0.0353 0.2395 0.7252
0.3029 0.3668 0.3302
0.6438 0.2772 0.0790
0.5217 0.3985 0.0798
0.6972 0.2128 0.6599
0.2101 0.2926 0.4973
X(:,:,6) =
0.3236 0.3221 0.3543
0.5614 0.0772 0.3614
0.4919 0.5050 0.0031
0.1608 0.3910 0.4482
0.3994 0.9686 0.3631
0.3526 0.1925 0.4549
sum(X, 2)
ans =
ans(:,:,1) =
1.0000
1.0000
1.0000
1.0000
0.4870
1.0000
ans(:,:,2) =
1.0000
1.0000
1.0000
1.0000
2.1470
1.0000
ans(:,:,3) =
1.0000
1.0000
1.0000
1.0000
1.1010
1.0000
ans(:,:,4) =
1.0000
1.0000
1.0000
1.0000
2.3759
1.0000
ans(:,:,5) =
1.0000
1.0000
1.0000
1.0000
1.5698
1.0000
ans(:,:,6) =
1.0000
1.0000
1.0000
1.0000
1.7310
1.0000