Write a function that returns that number of rows in a vector or matrix x
x = [1; 2; 3]
output = 3
Back to basics 6 - Column Vector
Symmetry of vector
Number of digits in an integer
Sum of diagonals elements of a matrix
Matlab Basics - Create a row vector
Finding an element in a vector
Matlab Basics II - Create a vector with a repeated entry
Matlab Basics II - Extract last 3 elements of a vector
Matlab Basics - Convert a row vector to a column vector
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