Cody

# Problem 1430. Create an n-by-n null matrix and fill with ones certain positions

Solution 231762

Submitted on 17 Apr 2013
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### Test Suite

Test Status Code Input and Output
1   Fail
%% n = 1; mat=[1 1]; ok = 1; assert(isequal(FillWithOnes(n,mat),ok))

```Error: Evaluation of 'y=accumarray(varargin{1},1,[varargin{2} varargin{2}]);' failed: Error using accumarray Third input SZ must be a full row vector with one element for each column of SUBS. ```

2   Fail
%% n = 2; mat=[1 2; 2 1]; ok = [0 1; 1 0]; assert(isequal(FillWithOnes(n,mat),ok))

```Error: Evaluation of 'y=accumarray(varargin{1},1,[varargin{2} varargin{2}]);' failed: Error using accumarray Third input SZ must be a full row vector with one element for each column of SUBS. ```

3   Fail
%% n=3; mat=[1 3; 3 2; 3 3]; ok = [0 0 1; 0 0 0; 0 1 1]; assert(isequal(FillWithOnes(n,mat),ok))

```Error: Evaluation of 'y=accumarray(varargin{1},1,[varargin{2} varargin{2}]);' failed: Error using accumarray Third input SZ must be a full row vector with one element for each column of SUBS. ```

4   Fail
%% n=4; mat=[1 3; 3 2; 3 3]; ok = [0 0 1 0; 0 0 0 0; 0 1 1 0; 0 0 0 0]; assert(isequal(FillWithOnes(n,mat),ok))

```Error: Evaluation of 'y=accumarray(varargin{1},1,[varargin{2} varargin{2}]);' failed: Error using accumarray Third input SZ must be a full row vector with one element for each column of SUBS. ```