Class: Item

Inherits:
Object
  • Object
show all
Defined in:
lib/quantile_estimator/item.rb

Overview

n = items k = asymptote S = data structure containing multiple tuples s = samples of items from the data stream

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value, g, delta, rank = nil) ⇒ Item

Returns a new instance of Item.



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# File 'lib/quantile_estimator/item.rb', line 7

def initialize(value, g, delta, rank=nil)
  self.value = value
  self.g = g
  self.delta = delta
  self.rank  = rank
end

Instance Attribute Details

#delta ⇒ Object

Returns the value of attribute delta.



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# File 'lib/quantile_estimator/item.rb', line 6

def delta
  @delta
end

#g ⇒ Object

Returns the value of attribute g.



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# File 'lib/quantile_estimator/item.rb', line 6

def g
  @g
end

#rank ⇒ Object

Returns the value of attribute rank.



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# File 'lib/quantile_estimator/item.rb', line 6

def rank
  @rank
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/quantile_estimator/item.rb', line 6

def value
  @value
end

Instance Method Details

#merge(item) ⇒ Object 



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# File 'lib/quantile_estimator/item.rb', line 14

def merge(item)
  Item.new(item.value, self.g + item.g, item.delta, item.rank)
end

#to_s ⇒ Object 



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# File 'lib/quantile_estimator/item.rb', line 18

def to_s
  [value, g, delta, rank].inspect
end