It needs more than one test
agree! it is easy to cheat!
to easy to cheat
The only valid excuse for cheating is when the test suite is broken since we cannot fix it. Kobayashi Maru.
Find the sum of the elements in the "second" diagonal
Add two numbers
Multiply by 3
First non-zero element in each column
Create a matrix X, where each column is a shifted copy of the vector v
Duplicate each element of a vector.
Remove NaN ?
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
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