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).
Make one big string out of two smaller strings
Getting logical indexes
sum of first 'n' terms
Find all elements less than 0 or greater than 10 and replace them with NaN
Remove all the words that end with "ain"
Clean the List of Names
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