Class: ActiveMetric::StandardDeviation

Inherits:
Stat
  • Object
show all
Defined in:
lib/active_metric/statistics/standard_deviation.rb

Instance Method Summary collapse

Methods inherited from Stat

#access_name, access_name, approximation, class_for, create_custom_stat, #property_from, #subject

Constructor Details

#initialize(*args) ⇒ StandardDeviation

Returns a new instance of StandardDeviation.



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# File 'lib/active_metric/statistics/standard_deviation.rb', line 4

def initialize(*args)
  super(*args)
end

Instance Method Details

#calculate(measurement) ⇒ Object 



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# File 'lib/active_metric/statistics/standard_deviation.rb', line 7

def calculate(measurement)
  set_standard_deviator unless @have_set_standard_deviator
end

#complete ⇒ Object 



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# File 'lib/active_metric/statistics/standard_deviation.rb', line 10

def complete
  set_standard_deviator unless @have_set_standard_deviator
  self.value = subject.standard_deviators[self.property].standard_deviation
end

#set_standard_deviator ⇒ Object 



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# File 'lib/active_metric/statistics/standard_deviation.rb', line 15

def set_standard_deviator
  @have_set_standard_deviator = true
  subject.ensure_standard_deviator_for(self.property)
end