Class: StatisticalMethods::Computer

Inherits:
Object
  • Object
show all
Defined in:
lib/statistical_methods/computer.rb

Overview

Calculation class

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Computer

Returns a new instance of Computer.



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# File 'lib/statistical_methods/computer.rb', line 4

def initialize
  @average = StatisticalMethods::SummaryStatistic::Location::Average
  @median = StatisticalMethods::SummaryStatistic::Location::Median
  @mode = StatisticalMethods::SummaryStatistic::Location::Mode
end

Instance Method Details

#geometric_mean(array) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 46

def geometric_mean(array)
  @average.new(array).geometric_mean
end

#harmonic_mean(array) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 42

def harmonic_mean(array)
  @average.new(array).harmonic_mean
end

#leader(array) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 63

def leader(array)
  Leader.new(array).find
end

#max(array) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 22

def max(array)
  array.max
end

#mean(array) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 14

def mean(array)
  @average.new(array).arithmetic_mean
end

#median(array) ⇒ Object

en.wikipedia.org/wiki/Median



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# File 'lib/statistical_methods/computer.rb', line 38

def median(array)
  @median.new(array).find
end

#min(array) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 18

def min(array)
  array.min
end

#mode(array) ⇒ Object

en.wikipedia.org/wiki/Mode_(statistics)



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# File 'lib/statistical_methods/computer.rb', line 51

def mode(array)
  @mode.new(array).find
end

#power_mean(array, exponent) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 59

def power_mean(array, exponent)
  @average.new(array).power_mean(exponent)
end

#quadratic_mean(array) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 55

def quadratic_mean(array)
  @average.new(array).quadratic_mean
end

#standard_deviation(array) ⇒ Object

en.wikipedia.org/wiki/Standard_deviation



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# File 'lib/statistical_methods/computer.rb', line 33

def standard_deviation(array)
  Math.sqrt(variance array)
end

#sum(array) ⇒ Object 



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# File 'lib/statistical_methods/computer.rb', line 10

def sum(array)
  array.addition
end

#variance(array) ⇒ Object

en.wikipedia.org/wiki/Variance



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# File 'lib/statistical_methods/computer.rb', line 27

def variance(array)
  arithmetic_mean = mean(array)
  mean(array.map { |value| (arithmetic_mean - value)**2 })
end