Cody

# Problem 351. Back to basics 8 - Matrix Diagonals

Solution 229780

Submitted on 12 Apr 2013 by VIVI
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### Test Suite

Test Status Code Input and Output
1   Pass
%% x = [1:4]; y_correct = [1 0 0 0; 0 2 0 0; 0 0 3 0; 0 0 0 4]; assert(isequal(diag_array(x),y_correct))

lx = 4 y = 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 y = 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 y = 1 0 0 0 0 2 0 0 0 0 1 0 0 0 0 1 y = 1 0 0 0 0 2 0 0 0 0 3 0 0 0 0 1 y = 1 0 0 0 0 2 0 0 0 0 3 0 0 0 0 4

2   Pass
%% x = [100 23 3.14 12 200]; y_correct = [100.0000 0 0 0 0; 0 23.0000 0 0 0; 0 0 3.1400 0 0; 0 0 0 12.0000 0; 0 0 0 0 200.0000] assert(isequal(diag_array(x),y_correct))

y_correct = 100.0000 0 0 0 0 0 23.0000 0 0 0 0 0 3.1400 0 0 0 0 0 12.0000 0 0 0 0 0 200.0000 lx = 5 y = 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 y = 100 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 y = 100 0 0 0 0 0 23 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 y = 100.0000 0 0 0 0 0 23.0000 0 0 0 0 0 3.1400 0 0 0 0 0 1.0000 0 0 0 0 0 1.0000 y = 100.0000 0 0 0 0 0 23.0000 0 0 0 0 0 3.1400 0 0 0 0 0 12.0000 0 0 0 0 0 1.0000 y = 100.0000 0 0 0 0 0 23.0000 0 0 0 0 0 3.1400 0 0 0 0 0 12.0000 0 0 0 0 0 200.0000