text: Cody
  
  Problem 67. Find common elements in matrix rows
  
  Solution 2015262
  
  Submitted on 12 Nov 2019 by Weiyang Zhang
  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
  x = []; y_correct = []; assert(isequal(common_by_row(x),y_correct))
  
  y = []
  
  2   Pass
  x = [1e100; 1e100]; y_correct = [1e100]; assert(isequal(common_by_row(x),y_correct))
  
  y = [] row_unique = 1 2
  
  3   Pass
  x = [1; 2]; y_correct = []; assert(isequal(common_by_row(x),y_correct))
  
  y = [] row_unique = 1
  
  4   Pass
  x = ones(10); y_correct = [1]; assert(isequal(common_by_row(x),y_correct))
  
  y = [] row_unique = 1 2 3 4 5 6 7 8 9 10
  
  5   Pass
  x = magic(10); y_correct = []; assert(isequal(common_by_row(x),y_correct))
  
  y = [] row_unique = 1 row_unique = 1 row_unique = 1 row_unique = 1 row_unique = 1 row_unique = 1 row_unique = 1 row_unique = 1 row_unique = 1 row_unique = 1
  
  6   Pass
  x = wilkinson(9); y_correct = [0 1]; assert(isequal(common_by_row(x),y_correct))
  
  y = [] row_unique = 1 2 3 4 5 6 7 8 9 row_unique = 1 2 3 4 5 6 7 8 9 row_unique = 1 9
  
  7   Pass
  x = [3 -2 1 NaN; NaN 0 -2 3]; y_correct = [-2 3]; assert(isequal(common_by_row(x),y_correct))
  
  y = [] row_unique = 1 2 row_unique = 1 row_unique = 1 2 row_unique = 0×1 empty double column vector