Module: LightModels

Defined in:
lib/lightmodels/jsonser_nav.rb,
lib/lightmodels/model.rb,
lib/lightmodels/query.rb,
lib/lightmodels/stats.rb,
lib/lightmodels/serialization.rb,
lib/lightmodels/model_building.rb

Overview

This module permits to manipulate Objects serialized as Hash

Defined Under Namespace

Modules: ModelBuilding, Query, Serialization Classes: CountingMap, Model

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.entropy(counting_map) ⇒ Object 



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# File 'lib/lightmodels/stats.rb', line 42

def self.entropy(counting_map)
  s = 0.0  
  counting_map.each do |k,v|
    p = counting_map.p(k)
    s += p*Math.log(p)
  end
  -s
end

Instance Method Details

#combine(arr1, arr2, &op) ⇒ Object 



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# File 'lib/lightmodels/stats.rb', line 63

def combine(arr1,arr2,&op)
  arr1.each do |el1|
    arr2.each {|el2| op.call(el1,el2)}
  end
end

#combine_self(arr, &op) ⇒ Object 



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# File 'lib/lightmodels/stats.rb', line 55

def combine_self(arr,&op)
  for i in 0..(arr.count-2)
    for j in (i+1)..(arr.count-1)
      op.call(arr[i],arr[j])
    end
  end
end

#idf(n, n_docs) ⇒ Object 



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# File 'lib/lightmodels/stats.rb', line 51

def idf(n,n_docs)
  Math.log(n_docs.to_f/n.to_f)
end