Problem 4. Make a checkerboard matrix

Solution 139915

Submitted on 17 Sep 2012 by Lee Gunsuck

Size: 12
Leading solution size is 7.

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1 Comment

1 Comment

Aaron T. Becker's Robot Swarm Lab on 8 Apr 2015

H = invhilb(n) generates the exact inverse of the exact invhilb(n) gives Hilbert matrix for n less than about 15. For larger n, invhilb(n) generates an approximation to the inverse Hilbert matrix.

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)))

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)))