databionics.esom.grid
Class ToroidGrid

java.lang.Object
  databionics.esom.grid.Grid
      databionics.esom.grid.MatrixGrid
          databionics.esom.grid.RectangularGrid
              databionics.esom.grid.ToroidRectangularGrid
                  databionics.esom.grid.ToroidGrid

Direct Known Subclasses:

ToroidEuclideanGrid, ToroidManhattanGrid, ToroidMaxGrid

public abstract class ToroidGrid
extends ToroidRectangularGrid

Toroid grid. Neuron numbering: 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

Field Summary

protected static org.apache.log4j.Logger

log interface to log4j system

Fields inherited from class databionics.esom.grid.RectangularGrid

columns, rows

Fields inherited from class databionics.esom.grid.MatrixGrid

weights

Fields inherited from class databionics.esom.grid.Grid

dim, distanceFunction, distanceFunctionName, size

Constructor Summary

ToroidGrid()
Standard constructor

ToroidGrid(int rows, int cols, int dim)
Constructor with sizes

Method Summary

void	findNeighbors(int index, int radius, cern.colt.list.IntArrayList neighbors, cern.colt.list.IntArrayList distances) Find all neighbors of a neuron within a given radius along with the distance from the center.

Methods inherited from class databionics.esom.grid.ToroidRectangularGrid

coordinates2index, shift

Methods inherited from class databionics.esom.grid.RectangularGrid

coordinates2index, getColumns, getNeuron, getRows, getWts, gridDistance, index2col, index2col, index2row, index2row, init, loadWeights, manhattanGridDistance, maximumGridDistance, saveWeights, saveWeights, setColumns, setRows, squaredEuclideanGridDistance

Methods inherited from class databionics.esom.grid.MatrixGrid

getNeuron, getWeights, init, setDim, setSize

Methods inherited from class databionics.esom.grid.Grid

dim, getDistanceFunction, getDistanceFunctionName, init, init, setDistanceFunction, setDistanceFunction, size, transformRadius

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected static final org.apache.log4j.Logger log

interface to log4j system

Constructor Detail

ToroidGrid

public ToroidGrid()

Standard constructor

ToroidGrid

public ToroidGrid(int rows,
                  int cols,
                  int dim)

Constructor with sizes

Parameters:

rows - Rows of data array.

cols - Columns of data array.

dim - Dimension of data array.

Method Detail

findNeighbors

public void findNeighbors(int index,
                          int radius,
                          cern.colt.list.IntArrayList neighbors,
                          cern.colt.list.IntArrayList distances)

Find all neighbors of a neuron within a given radius along with the distance from the center. The results are saved in the two list parameters given by reference.

Specified by:

findNeighbors in class Grid

Parameters:

index - index of neuron

radius - radius around center

neighbors - list of neighbors' indices

distance - corresponding distances