A row vector is not a matrix...
Not very clear problem, flip vertically? horizontally? elementwise?
The problem is really to just reverse a row vector. A row vector happens to be a matrix, but so does a column vector, and two or more dimensional matrices. Saying, "reverse a matrix" is ambiguous.
Generate pi using logarithm
Replace multiples of 5 with NaN
Return area of square
Find the dimensions of a matrix
Concatenate two strings
Find the area of the four walls
Create the following sequence : 0 1 1 4 9 25 64 169 ...
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