Problem 4. Make a checkerboard matrix

Solution 726292

Submitted on 31 Aug 2015 by Ramsey Kropp

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3 Comments

3 Comments

Ramsey Kropp on 31 Aug 2015

There has to be a better way

mec on 10 Oct 2015

This one works on matlab but not here
function a = checkerboard(n)
theta=pi/2:pi/2:n*pi/2;
a = (sin(theta)'*sin(theta))+cos(theta)'*cos(theta);
end

Rohan Shingade on 13 Mar 2016

hey mec.The function you which you have created gives negative one's(data type double) in the upper triangular and lower triangular part whereas the output should be all positive so first convert to data type integer using int function then convert to one's and zero's using logical.

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

Pass

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

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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