Problem 4. Make a checkerboard matrix

Solution 351884

Submitted on 15 Nov 2013

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Cesar on 15 Nov 2013

Why is this solution getting the wrong values on the second solution set yet when I input it into MatLab to test it they are correct?

Tim on 15 Nov 2013

With an even-sized array, when you go from row 1 to row 2, the sequence has two zeros in a row instead of alternating zeros and ones.

Test	Status	Code Input and Output
1	Pass	%% n = 5; a = [1 0 1 0 1; 0 1 0 1 0; 1 0 1 0 1; 0 1 0 1 0; 1 0 1 0 1]; assert(isequal(a,checkerboard(n))) a = 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
2	Fail	%% n = 4; a = [1 0 1 0; 0 1 0 1; 1 0 1 0; 0 1 0 1]; assert(isequal(a,checkerboard(n))) Error: Assertion failed.

Test

Status

Code Input and Output

Pass

%% n = 5; a = [1 0 1 0 1; 0 1 0 1 0; 1 0 1 0 1; 0 1 0 1 0; 1 0 1 0 1]; assert(isequal(a,checkerboard(n)))

a = 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

Fail

%% n = 4; a = [1 0 1 0; 0 1 0 1; 1 0 1 0; 0 1 0 1]; assert(isequal(a,checkerboard(n)))

Error: Assertion failed.