Class: BLEU::NgramCounts

Inherits:
Object
  • Object
show all
Defined in:
lib/zipf/bleu.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(n) ⇒ NgramCounts

Returns a new instance of NgramCounts.



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# File 'lib/zipf/bleu.rb', line 7

def initialize(n)
  @n = 0
  @sum = []
  @clipped = []
  @ref_len = 0.0
  @hyp_len = 0.0
  grow(n)
end

Instance Attribute Details

#clipped ⇒ Object

Returns the value of attribute clipped.



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# File 'lib/zipf/bleu.rb', line 5

def clipped
  @clipped
end

#hyp_len ⇒ Object

Returns the value of attribute hyp_len.



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# File 'lib/zipf/bleu.rb', line 5

def hyp_len
  @hyp_len
end

#n ⇒ Object

Returns the value of attribute n.



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# File 'lib/zipf/bleu.rb', line 5

def n
  @n
end

#ref_len ⇒ Object

Returns the value of attribute ref_len.



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# File 'lib/zipf/bleu.rb', line 5

def ref_len
  @ref_len
end

#sum ⇒ Object

Returns the value of attribute sum.



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# File 'lib/zipf/bleu.rb', line 5

def sum
  @sum
end

Instance Method Details

#grow(n) ⇒ Object 



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# File 'lib/zipf/bleu.rb', line 16

def grow(n)
  (n-@n).times {
    @sum << 0.0
    @clipped << 0.0
  }
  @n = n
end

#plus_eq(other) ⇒ Object 



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# File 'lib/zipf/bleu.rb', line 24

def plus_eq(other)
  if other.n > @n then grow(other.n) end
  0.upto(other.n-1) { |m|
    @sum[m] += other.sum[m]
    @clipped[m] += other.clipped[m]
  }
  @ref_len += other.ref_len
  @hyp_len += other.hyp_len
end

#to_s ⇒ Object 



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# File 'lib/zipf/bleu.rb', line 34

def to_s
  return "n=#{n} sum=#{sum} clipped=#{clipped} ref_len=#{ref_len} hyp_len=#{hyp_len}"
end