Write a function that returns that number of rows in a vector or matrix x
x = [1; 2; 3]
output = 3
Matrix indexing with two vectors of indices
Area of a circle
Matlab Basics II - Unit Conversion
Matlab Basics - Assigning Variables
Matlab Basics - y as a function of x
Matlab Basics II - Create a vector with a repeated entry
Matlab Basics - Rounding III
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