Extract arrays of a matrix using FOR loop

Hello everyone

the question is: Write a code using FOR loop that extract Main diagonal of any n*n matrix.

i know diag will do the job but i wanna write it with FOR loop

Thanks in advance

Answer 1

[AKAYDIN]

A = rand(10,10) % random matrix when n=10

A = 10×10

0.8978 0.6904 0.2470 0.1673 0.0527 0.2011 0.7330 0.9430 0.0088 0.3763 0.0042 0.5003 0.2743 0.2955 0.7764 0.4320 0.6582 0.3441 0.8988 0.9263 0.9867 0.2533 0.0639 0.8561 0.1614 0.5897 0.7317 0.7973 0.9941 0.6897 0.2935 0.3559 0.7120 0.3738 0.0453 0.6130 0.1864 0.2341 0.3009 0.1276 0.2284 0.4807 0.9728 0.8918 0.2230 0.4444 0.0003 0.4556 0.6955 0.6698 0.9492 0.5336 0.1320 0.4075 0.0789 0.4972 0.6743 0.0642 0.9191 0.3812 0.7728 0.5496 0.9692 0.0059 0.6290 0.0335 0.1770 0.5867 0.7811 0.1029 0.5000 0.7460 0.1441 0.0938 0.4036 0.9811 0.7278 0.6073 0.1062 0.7536 0.6630 0.3329 0.6754 0.2912 0.2135 0.0484 0.0749 0.5416 0.3906 0.1092 0.5241 0.8132 0.0720 0.7198 0.6078 0.3771 0.5940 0.5341 0.6533 0.5983

for i=1:length(A)
diagonal(i) = A(i,i);
end

diagonal

diagonal = 1×10

0.8978 0.5003 0.0639 0.3738 0.2230 0.4972 0.1770 0.6073 0.3906 0.5983