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).
Project Euler: Problem 7, Nth prime
Check if number exists in vector
Sum the numbers on the main diagonal
Perfect Square or not
DNA N-Gram Distribution
Return a list sorted by number of occurrences
Find relatively common elements in matrix rows
Who Has the Most Change?
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