Cody

# Problem 67. Find common elements in matrix rows

Solution 2011814

Submitted on 10 Nov 2019 by Le Quynh Trang Ngo
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### Test Suite

Test Status Code Input and Output
1   Pass
x = []; y_correct = []; assert(isequal(common_by_row(x),y_correct))

s = 0 0 u = 0×1 empty double column vector y = []

2   Pass
x = [1e100; 1e100]; y_correct = [1e100]; assert(isequal(common_by_row(x),y_correct))

s = 2 1 u = 1.0000e+100 B = 1 B = 1 1 Z = 1.0000e+100 y = 1.0000e+100

3   Pass
x = [1; 2]; y_correct = []; assert(isequal(common_by_row(x),y_correct))

s = 2 1 u = 1 2 B = 1 B = 1 0 B = [] B = 0 B = [] y = []

4   Pass
x = ones(10); y_correct = [1]; assert(isequal(common_by_row(x),y_correct))

s = 10 10 u = 1 B = 10 B = 10 10 B = 10 10 10 B = 10 10 10 10 B = 10 10 10 10 10 B = 10 10 10 10 10 10 B = 10 10 10 10 10 10 10 B = 10 10 10 10 10 10 10 10 B = 10 10 10 10 10 10 10 10 10 B = 10 10 10 10 10 10 10 10 10 10 Z = 1 y = 1

5   Pass
x = magic(10); y_correct = []; assert(isequal(common_by_row(x),y_correct))

s = 10 10 u = 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] B = 0 B = [] y = []

6   Pass
x = wilkinson(9); y_correct = [0 1]; assert(isequal(common_by_row(x),y_correct))

s = 9 9 u = 0 1 2 3 4 B = 7 B = 7 6 B = 7 6 6 B = 7 6 6 6 B = 7 6 6 6 7 B = 7 6 6 6 7 6 B = 7 6 6 6 7 6 6 B = 7 6 6 6 7 6 6 6 B = 7 6 6 6 7 6 6 6 7 Z = 0 B = 1 6 6 6 7 6 6 6 7 B = 1 2 6 6 7 6 6 6 7 B = 1 2 2 6 7 6 6 6 7 B = 1 2 2 3 7 6 6 6 7 B = 1 2 2 3 2 6 6 6 7 B = 1 2 2 3 2 3 6 6 7 B = 1 2 2 3 2 3 2 6 7 B = 1 2 2 3 2 3 2 2 7 B = 1 2 2 3 2 3 2 2 1 Z = 0 1 B = 0 2 2 3 2 3 2 2 1 B = [] B = 0 B = [] B = 1 B = 1 0 B = [] y = 0 1

7   Pass
x = [3 -2 1 NaN; NaN 0 -2 3]; y_correct = [-2 3]; assert(isequal(common_by_row(x),y_correct))

s = 2 4 u = -2 0 1 3 NaN NaN B = 1 B = 1 1 Z = -2 B = 0 1 B = [] B = 1 B = 1 0 B = [] B = 1 B = 1 1 Z = -2 3 B = 0 1 B = [] B = 0 B = [] y = -2 3