Class: KDTree::Point

Inherits:
Array
  • Object
show all
Defined in:
lib/kd_tree/point.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/kd_tree/point.rb', line 3

def data
  @data
end

Instance Method Details

#distance_from(target, metric) ⇒ Object 



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# File 'lib/kd_tree/point.rb', line 5

def distance_from(target, metric)
  i = 0
  case metric
    when :euclidean
      self.inject(0) do |acc, el|
        dist = acc + ((el-target[i])**2.0)
        i += 1
        dist
      end
    when :manhattan
      self.inject(0) do |acc, el|
        dist = acc + (el-target[i]).abs
        i += 1
        dist
      end
    when :chebyshev
      self.inject(0) do |acc, el|
        delt = (el-target[i]).abs
        dist = delt > acc ? delt : acc
        i += 1
        dist
      end
  end
end