Sha256: 8df7d36cf3d2c6dbad03ff86fe3812c12885d41e161857890320c97b8615ab0f
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Size: 580 Bytes
Versions: 5
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Stored size: 580 Bytes
Contents
module Misc Log2Multiplier = 1.0 / Math.log(2.0) def self.log2(x) Math.log(x) * Log2Multiplier end def self.max(list) max = nil list.each do |v| next if v.nil? max = v if max.nil? or v > max end max end def self.sum(list) list.compact.inject(0.0){|acc,e| acc += e} end def self.mean(list) sum(list) / list.compact.length end def self.sd(list) return nil if list.length < 3 mean = mean(list) Math.sqrt(list.compact.inject(0.0){|acc,e| d = e - mean; acc += d * d}) / (list.compact.length - 1) end end
Version data entries
5 entries across 5 versions & 1 rubygems