AtLeast returns the greater of x or lower.

CalcEntropy calculates the entropy of m.

MaxInt returns the larger one of a and b.

MinInt returns the smaller one of a and b.

NewProba returns a Proba.

NewUnstable returns an Unstable.

A Proba is used to test if true on given probability.

An Unstable is used to generate random value around the mean value base on given deviation.