org.simbrain.util.projection

Class ProjectNNSubspace

java.lang.Object

org.simbrain.util.projection.ProjectionMethod

org.simbrain.util.projection.ProjectNNSubspace

public class ProjectNNSubspace
extends ProjectionMethod

ProjectNNSubspace is a Nearest Neighbor Subspace Method. (1) Takes each new point and determines the three points in the current data set that are closest to it. (2) Finds the projection of the new point into the two-dimensional subspace that contains the three nearest neighbors in the high-dimensional space. (3) Uses the three nearest neighbors and their corresponding points in the low dimensional dataset to find an affine map that approximates the full projection method (whichever one is currently being used). (4) Applies the affine map to the new datapoint.

Author:

Scott Hotton

Field Summary

Fields inherited from class org.simbrain.util.projection.ProjectionMethod

projector

Constructor Summary

Constructors

Constructor and Description
ProjectNNSubspace(Projector projector) Default PCA project.

Method Summary

Modifier and Type	Method and Description
void	init() Perform any initialization necessary for a given projection method.
void	project() Perform operations necessary to project the data.
int	suggestedMinPoints() Some projection methods require a certain number of datapoints to be added before they work well.

Methods inherited from class org.simbrain.util.projection.ProjectionMethod

isIterable

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectNNSubspace

public ProjectNNSubspace(Projector projector)

Default PCA project.

Parameters:

projector -

Method Detail

init

public void init()

Description copied from class: ProjectionMethod

Perform any initialization necessary for a given projection method.

Specified by:

init in class ProjectionMethod

project

public void project()

Description copied from class: ProjectionMethod

Perform operations necessary to project the data. For iterable functions this is just a stub.

Specified by:

project in class ProjectionMethod

suggestedMinPoints

public int suggestedMinPoints()

Description copied from class: ProjectionMethod

Some projection methods require a certain number of datapoints to be added before they work well. By default this is 0 because most methods don't require this. Those methods that do can override this. It is used to generate a warning in the GUI if a method is selected when fewer then suggested min points have been added to the dataset.

Overrides:

suggestedMinPoints in class ProjectionMethod

Returns:

the suggested minimum number of points.