Cody

# Problem 38. Return a list sorted by number of occurrences

Solution 2098922

Submitted on 19 Jan 2020
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### Test Suite

Test Status Code Input and Output
1   Fail
x = [1 2 2 2 3 3 7 7 93] y_correct = [2 3 7 1 93]; assert(isequal(popularity(x),y_correct))

x = 1 2 2 2 3 3 7 7 93 y = []

Error using matlab.internal.math.sortrowsParseInputs Sorting direction must be 'ascend' or 'descend'. Error in sortrows (line 64) [col, nanflag, compareflag] = matlab.internal.math.sortrowsParseInputs(ismatrix(A),size(A,2),A,varargin{:}); Error in popularity (line 7) y = unique(sortrows(y,2,'descending')) Error in Test1 (line 3) assert(isequal(popularity(x),y_correct))

2   Fail
x = [-1 19 20 -1 -1 87 19 34 19 -1 21 87 20 10 20 34 19 -1]; y_correct = [-1 19 20 34 87 10 21]; assert(isequal(popularity(x),y_correct))

y = []

Error using matlab.internal.math.sortrowsParseInputs Sorting direction must be 'ascend' or 'descend'. Error in sortrows (line 64) [col, nanflag, compareflag] = matlab.internal.math.sortrowsParseInputs(ismatrix(A),size(A,2),A,varargin{:}); Error in popularity (line 7) y = unique(sortrows(y,2,'descending')) Error in Test2 (line 3) assert(isequal(popularity(x),y_correct))