Cody

# Problem 2813. Create a block diagonal matrix

Solution 1709932

Submitted on 18 Jan 2019 by HH
• Size: 9
• This is the leading solution.
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### Test Suite

Test Status Code Input and Output
1   Pass
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))

[Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In block_diagonal (line 2) In ScoringEngineTestPoint1 (line 4) In solutionTest (line 3)]

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

[Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In block_diagonal (line 2) In ScoringEngineTestPoint2 (line 4) In solutionTest (line 5)]

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

[Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In block_diagonal (line 2) In ScoringEngineTestPoint3 (line 4) In solutionTest (line 7)]

4   Pass
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))

[Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In block_diagonal (line 2) In ScoringEngineTestPoint4 (line 4) In solutionTest (line 9)]

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

[Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In block_diagonal (line 2) In ScoringEngineTestPoint5 (line 4) In solutionTest (line 11)]

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

[Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In block_diagonal (line 2) In ScoringEngineTestPoint6 (line 4) In solutionTest (line 13)]

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

[Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In block_diagonal (line 2) In ScoringEngineTestPoint7 (line 4) In solutionTest (line 15)]