what's the "str2num" mean?
str2num means "convert string to number"; even more cryptic is the fact that "str2num 1:10" is equivalent to "str2num('1:10')" (Matlab allows you to omit the single quotes and parentheses when using functions that take character strings as arguments).
Find the peak 3n+1 sequence value
Implement a ROT13 cipher
Project Euler: Problem 10, Sum of Primes
Create a square matrix of multiples
Find relatively common elements in matrix rows
The Goldbach Conjecture
Replace NaNs with the number that appears to its left in the row.
The Goldbach Conjecture, Part 2
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