Cody

# Problem 796. Removing rows from a matrix is easy - but what about inserting rows?

Solution 1854729

Submitted on 20 Jun 2019
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   Pass
A = 1; IND = 1; b = 1; y_correct = [1;1]; assert(isequal(insertRows(A, IND, b), y_correct))

y = 1 y = 1 1

2   Fail
A = [0 0; 1 1]; IND = [1 1 1 2]; b = NaN; y_correct = [0 0;NaN NaN;NaN NaN;NaN NaN;1 1;NaN NaN]; assert(isequalwithequalnans(insertRows(A, IND, b), y_correct))

y = 0 0 y = 0 0 NaN NaN y = 0 0 NaN NaN NaN NaN y = 0 0 NaN NaN NaN NaN NaN NaN y = 0 0 NaN NaN NaN NaN NaN NaN 1 1

Index in position 1 exceeds array bounds (must not exceed 1). Error in insertRows (line 6) y = [y;repmat(b(IND(ct),:),1,size(A,2)/size(b,2))] Error in Test2 (line 5) assert(isequalwithequalnans(insertRows(A, IND, b), y_correct))

3   Fail
A = [1 1; 3 3; 4 4]; IND = [1 3]; b = [2 2; 5 5]; y_correct = [1 1;2 2;3 3;4 4;5 5]; assert(isequal(insertRows(A, IND, b), y_correct))

y = 1 1 y = 1 1 2 2 y = 1 1 2 2 3 3 y = 1 1 2 2 3 3 4 4

Index in position 1 exceeds array bounds (must not exceed 2). Error in insertRows (line 6) y = [y;repmat(b(IND(ct),:),1,size(A,2)/size(b,2))] Error in Test3 (line 5) assert(isequal(insertRows(A, IND, b), y_correct))

4   Pass
A = (1:2:10)'; IND = 1:5; b = (2:2:10)'; y_correct = (1:10)'; assert(isequal(insertRows(A, IND, b), y_correct))

y = 1 y = 1 2 y = 1 2 3 y = 1 2 3 4 y = 1 2 3 4 5 y = 1 2 3 4 5 6 y = 1 2 3 4 5 6 7 y = 1 2 3 4 5 6 7 8 y = 1 2 3 4 5 6 7 8 9 y = 1 2 3 4 5 6 7 8 9 10

5   Fail
A = zeros(10,5); IND = [3,7]; b = rand(2,5); y_correct = [zeros(3,5); b(1,:); zeros(4,5); b(2,:); zeros(3,5)]; assert(isequal(insertRows(A, IND, b), y_correct))

y = 0 0 0 0 0 y = 0 0 0 0 0 0 0 0 0 0 y = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Index in position 1 exceeds array bounds (must not exceed 2). Error in insertRows (line 6) y = [y;repmat(b(IND(ct),:),1,size(A,2)/size(b,2))] Error in Test5 (line 5) assert(isequal(insertRows(A, IND, b), y_correct))

6   Pass
assert(isempty(strfind(evalc('type insertRows'), 'regexp')));