Write a function that returns that number of rows in a vector or matrix x
x = [1; 2; 3]
output = 3
First N Perfect Squares
Rotate a Matrix by 90 degrees
Generate a NaN...on purpose
Sum of odd numbers in a matrix
Matlab Basics - Pick out parts of a vector
Matlab Basics - Convert a row vector to a column vector
Matlab Basics - Switching Assignments
Replace every 3rd element in a vector with 4
Matlab Basics II - Free Fall
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