Check if a inputted variable is a number or a string, given a string input (i.e. '1' is 1 and thus a number, 'a' is a string).
Additional test cases have been added.
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07 - Common functions and indexing 2
Convert Fahrenheit to Celsius
Matlab Basics II - Intervals
Vector Element Multiplication
Vector indexing: lower than mean
Find the mean of two vectors
Simple Vector Addition
Replace 0 indices in array with 1's
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