Cody

# Problem 1508. Change the sign

Solution 244431

Submitted on 14 May 2013 by James
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### Test Suite

Test Status Code Input and Output
1   Pass
%% x = [-1 2 3;1 -2 -2;3 3 -3]; y_correct = [ 1 -3 -3;-2 2 -2;-3 -3 3]; assert(isequal(SignChange(x),y_correct))

a = 0 2 3 1 0 2 3 3 0 amax = 3 2 3 ans = 1 -3 -3 -2 2 -2 -3 -3 3

2   Pass
%% x = magic(4); y_correct = [16 -13 -13 -13; -10 11 -10 -10;-12 -12 6 -12;-15 -15 -15 1]; assert(isequal(SignChange(x),y_correct))

a = 0 2 3 13 5 0 10 8 9 7 0 12 4 14 15 0 amax = 13 10 12 15 ans = 16 -13 -13 -13 -10 11 -10 -10 -12 -12 6 -12 -15 -15 -15 1

3   Pass
%% x = zeros(4); y_correct = x; assert(isequal(SignChange(x),y_correct))

a = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 amax = 0 0 0 0 ans = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

4   Pass
%% x = [-1 1 -1;1 -1 1;-1 -2 -3]; y_correct = [1 -1 -1;-1 1 -1;-2 -2 3]; assert(isequal(SignChange(x),y_correct))

a = 0 1 1 1 0 1 1 2 0 amax = 1 1 2 ans = 1 -1 -1 -1 1 -1 -2 -2 3