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Size: 616 Bytes
Versions: 5
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Stored size: 616 Bytes
Contents
class Palette
module Statistics
begin
require "enumerable/statistics"
def self.mean(enum)
enum.mean
end
def self.stdev(enum, population: false)
enum.stdev(population: population)
end
rescue LoadError
def self.mean(enum)
xs = enum.to_a
xs.sum / xs.length.to_f
end
def self.stdev(enum, population: false)
xs = enum.to_a
n = xs.length
mean = xs.sum.to_f / n
ddof = population ? 0 : 1
var = xs.map {|x| (x - mean)**2 }.sum / (n - ddof)
Math.sqrt(var)
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems