Package org.apache.commons.math3.ml.neuralnet.twod.util

Class UnifiedDistanceMatrix

java.lang.Object
org.apache.commons.math3.ml.neuralnet.twod.util.UnifiedDistanceMatrix
All Implemented Interfaces:
MapVisualization
public class UnifiedDistanceMatrix extends Object implements MapVisualization
U-Matrix visualization of high-dimensional data projection.
Since:
3.6

  • Constructor Details

    • UnifiedDistanceMatrix

      public UnifiedDistanceMatrix(boolean individualDistances, DistanceMeasure distance)
      Simple constructor.
      Parameters:
      individualDistances - If true, the 8 individual inter-units distances will be computed. They will be stored in additional pixels around each of the original units of the 2D-map. The additional pixels that lie along a "diagonal" are shared by two pairs of units: their value will be set to the average distance between the units belonging to each of the pairs. The value zero will be stored in the pixel corresponding to the location of a unit of the 2D-map.
      If false, only the average distance between a unit and all its neighbours will be computed (and stored in the pixel corresponding to that unit of the 2D-map). In that case, the number of neighbours taken into account depends on the network's neighbourhood type.
      distance - Distance.

  • Method Details

    • computeImage

      public double[][] computeImage(NeuronSquareMesh2D map)
      Creates an image of the map.
      Specified by:
      computeImage in interface MapVisualization
      Parameters:
      map - Map.
      Returns:
      a 2D-array (in row major order) representing the property.