Can anyone help me out what does sign(rand-0.5) command mean
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Atsushi Ueno 2022-3-19
rand generates a uniformly distributed random number between 0 and 1.
So, rand-0.5 means random number between -0.5 and 0.5.
rand returns an array Y the same size as x, where each element of Y is:
- 1 if the corresponding element of x is greater than 0.
- 0 if the corresponding element of x equals 0.
- -1 if the corresponding element of x is less than 0.
So, sign(rand-0.5) usually outputs -1 or 1 like a result of coin toss.
It is extremely rare for sign(rand-0.5) to output 0