Class: FpGrowth::Miner::Pattern

Inherits:
Object
  • Object
show all
Defined in:
lib/fpgrowth/miner/pattern.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(content = [], support = 0) ⇒ Pattern

Returns a new instance of Pattern.



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# File 'lib/fpgrowth/miner/pattern.rb', line 9

def initialize(content=[], support = 0)
  @content = content
  @support = support
end

Instance Attribute Details

#content ⇒ Object (readonly)

Returns the value of attribute content.



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# File 'lib/fpgrowth/miner/pattern.rb', line 6

def content
  @content
end

#support ⇒ Object

Returns the value of attribute support.



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# File 'lib/fpgrowth/miner/pattern.rb', line 7

def support
  @support
end

Instance Method Details

#+(y) ⇒ Object 



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# File 'lib/fpgrowth/miner/pattern.rb', line 14

def +(y)
  return self unless y
  return Pattern.new(@content + y.content, [@support, y.support].min)
end

#<<(y) ⇒ Object 



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# File 'lib/fpgrowth/miner/pattern.rb', line 19

def <<(y)
  if y.is_a?(Array)
    min_support = @support
    for node in y
      unless @content.include?(node.item)
        @content << node.item
        if min_support > node.support then
          min_support = node.support
        end
      end
    end
    @support = min_support
  elsif y.is_a?(FpTree::Node)
    self << [y]
  end

end

#clone ⇒ Object 



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# File 'lib/fpgrowth/miner/pattern.rb', line 41

def clone
  return Pattern.new(@content.clone, @support)
end

#size ⇒ Object 



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# File 'lib/fpgrowth/miner/pattern.rb', line 37

def size
  @content.size
end