org.hisee.core
Class AddData

java.lang.Object
  |
  +--org.hisee.core.AddData

public class AddData

extends java.lang.Object

AddData is a set of functions for adding new datapoints to existing datasets, when a projection is being used in real-time. These methods will generally be fast as compared with, for example, re-running the Sammon map each time a new point is added.

Constructor Summary

AddData()

Method Summary

static double[]	coordinate(int i, int j, double[] hi_point) Coordinate project new points
static double[]	nn_subspace(Dataset upstairs, Dataset downstairs, double[] hi_point) Adds new datapoint to subspace spanned by nearest-neighbors
static double[]	triangulate(Dataset upstairs, Dataset downstairs, double[] hi_point) Adds a new datapoint which preserves distances to nearest neighbors

Methods inherited from class java.lang.Object

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

Constructor Detail

AddData

public AddData()

Method Detail

coordinate

public static double[] coordinate(int i,
                                  int j,
                                  double[] hi_point)

Coordinate project new points

Parameters:

i - first low-d coordinate for projection

j - second low-d coordinate for projection

hi_point - new point upstairs

Returns:

projected point downstairs

triangulate

public static double[] triangulate(Dataset upstairs,
                                   Dataset downstairs,
                                   double[] hi_point)

Adds a new datapoint which preserves distances to nearest neighbors

Parameters:

upstairs - reference to upstairs dataset

downstairs - reference to downstairs dataset

hi_point - new hi-d point to be added

Returns:

low-d point

nn_subspace

public static double[] nn_subspace(Dataset upstairs,
                                   Dataset downstairs,
                                   double[] hi_point)

Adds new datapoint to subspace spanned by nearest-neighbors

Parameters:

upstairs - reference to upstairs dataset

downstairs - reference to downstairs dataset

hi_point - new hi-d point to be added

Returns:

low-d point