Cody

Problem 2813. Create a block diagonal matrix

Solution 2766547

Submitted on 1 Aug 2020
This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

Test Suite

Test Status Code Input and Output
1   Fail
a = [1 2 3]; n = 3; A_correct = [1 2 3 0 0 0 0 0 0; 0 0 0 1 2 3 0 0 0; 0 0 0 0 0 0 1 2 3]; assert(isequal(block_diagonal(a,n),A_correct))

Assertion failed.

2   Pass
a = []; n = 3; A_correct = []; assert(isequal(block_diagonal(a,n),A_correct))

3   Pass
a = [1 2 -3]'; n = 0; A_correct = []; assert(isequal(block_diagonal(a,n),A_correct))

4   Fail
a = [3 -2]'; n = 4; A_correct = [3 -2 0 0 0 0 0 0; 0 0 3 -2 0 0 0 0; 0 0 0 0 3 -2 0 0; 0 0 0 0 0 0 3 -2]'; assert(isequal(block_diagonal(a,n),A_correct))

Assertion failed.

5   Pass
a = 6; n = 23; A_correct = a*eye(n); assert(isequal(block_diagonal(a,n),A_correct))

6   Fail
a = magic(5); n = 2; A_correct = [a zeros(5); zeros(5) a]; assert(isequal(block_diagonal(a,n),A_correct))

Assertion failed.

7   Fail
a = randi(100,13,8); n = 1; A_correct = a; assert(isequal(block_diagonal(a,n),A_correct))

Assertion failed.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!