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.
Increment a number, given its digits
Remove NaN ?
Back to basics 21 - Matrix replicating
Implement simple rotation cypher
Produce a cosine wave
Remove TeX from string
Split up vector or matrix delimited by NaNs
Get input and output variable names
Test within tolerance
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