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).
Rotate input square matrix 90 degrees CCW without rot90
Number of Horns on a unicorn!
Create a two dimensional zero matrix
Add offset to a signal
Longest Divisor Run
Alphabetize by last name
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