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Contents
module Math
# Returns the Cumulative Density Function of this
# sample (normalised to a fraction of 1.0).
def self.cdf(array, normalised=1.0)
s = sum(array).to_f
array.sort.inject([0.0]) { |c,d| c << c[-1] + normalised*d.to_f/s }
end
end
Version data entries
9 entries across 8 versions & 2 rubygems