Class: Mjai::Manue::HoraPointsEstimate::ProbablisticFan

Inherits:
Object
  • Object
show all
Defined in:
lib/mjai/manue/hora_points_estimate.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(arg) ⇒ ProbablisticFan

Returns a new instance of ProbablisticFan.



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 41

def initialize(arg)
  if arg.is_a?(Integer)
    @probs = {arg => 1.0}
  else
    @probs = arg
  end
end

Instance Attribute Details

#probs ⇒ Object (readonly)

Returns the value of attribute probs.



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 49

def probs
  @probs
end

Class Method Details

.prob_average(pfans) ⇒ Object 



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 27

def self.prob_average(pfans)
  return prob_weighted_average(pfans.map(){ |pf| [pf, 1.0 / pfans.size] })
end

.prob_weighted_average(weighted_pfans) ⇒ Object 



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 31

def self.prob_weighted_average(weighted_pfans)
  new_probs = Hash.new(0.0)
  for pfan, weight in weighted_pfans
    for fan, prob in pfan.probs
      new_probs[fan] += prob * weight
    end
  end
  return ProbablisticFan.new(new_probs)
end

Instance Method Details

#*(other) ⇒ Object 



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 55

def *(other)
  return apply(other){ |f1, f2| f1 * f2 }
end

#+(other) ⇒ Object 



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 51

def +(other)
  return apply(other){ |f1, f2| f1 + f2 } 
end

#apply(other, &block) ⇒ Object 



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 67

def apply(other, &block)
  new_probs = Hash.new(0.0)
  for f1, p1 in @probs
    for f2, p2 in other.probs
      new_probs[block.call(f1, f2)] += p1 * p2 if p1 * p2 > 0.0
    end
  end
  return ProbablisticFan.new(new_probs)
end

#expected ⇒ Object 



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 63

def expected
  @probs.map(){ |f, pr| f * pr }.inject(0.0, :+)
end

#max(other) ⇒ Object 



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# File 'lib/mjai/manue/hora_points_estimate.rb', line 59

def max(other)
  return apply(other){ |f1, f2| [f1, f2].max }
end