Problem 4. Make a checkerboard matrix

Solution 817596

Submitted on 1 Feb 2016

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2 Comments

2 Comments

Robert Price on 1 Feb 2016

function a = tests(n)
a = ones(n);
a(2:2:numel(a)) = 0;
end

Any ideas why this only works on matreices with an odd number of rows/columns? On the even matrices it changes entire rows to 0's or 1's

Rohan Shingade on 27 Feb 2016

the ones and zeroes should be alternate whatever their position be. In even columns/rows the element a(1,1) and a(1,2) both remain the same i.e. 1 and 1 so it doesn't work for even number of columns\rows.

Test Suite

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)))
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))) Assertion failed.
3	Pass	%% n = 7; 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 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)))

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)))

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)))

Assertion failed.

Pass

%% n = 7; 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 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)))

Problem 4. Make a checkerboard matrix

Test Suite

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Problem 4. Make a checkerboard matrix

Test Suite

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