Class: Cluster1D

Inherits:
Object
  • Object
show all
Defined in:
lib/jkr/stat/kmeans-1d.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(center) ⇒ Cluster1D

Constructor with a starting centerpoint



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# File 'lib/jkr/stat/kmeans-1d.rb', line 6

def initialize(center)
  @center = center
  @points = []
end

Instance Attribute Details

#center ⇒ Object

Returns the value of attribute center.



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# File 'lib/jkr/stat/kmeans-1d.rb', line 3

def center
  @center
end

#points ⇒ Object

Returns the value of attribute points.



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# File 'lib/jkr/stat/kmeans-1d.rb', line 3

def points
  @points
end

Instance Method Details

#recenter! ⇒ Object

Recenters the centroid point and removes all of the associated points



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# File 'lib/jkr/stat/kmeans-1d.rb', line 12

def recenter!
  avg = 0
  old_center = @center

  # Sum up all x/y coords
  @points.each do |point|
    avg += point
  end

  # Average out data
  if points.length == 0
    avg = center
  else
    avg /= points.length
  end

  # Reset center and return distance moved
  @center = avg
  return (old_center - center).abs
end