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).
Distance walked 3D
Arrange Vector in descending order
Getting the indices from a vector
Sophie Germain prime
Remove the Zero
Implement a ROT13 cipher
Find the alphabetic word product
Times 2 - START HERE
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