Return true if the input is a Smith number in base ten. Otherwise, return false. Read about Smith numbers at http://en.wikipedia.org/wiki/Smith_number.
A Smith number must be positive and have more than one factor.
Project Euler: Problem 3, Largest prime factor
First non-zero element in each column
Stuff the Board
Set the array elements whose value is 13 to 0
Count up then down
Test within tolerance
Get input and output variable names
Remove TeX from string
Split up vector or matrix delimited by NaNs
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