org.apache.spark.mllib.feature

Class PCA

java.lang.Object

org.apache.spark.mllib.feature.PCA

public class PCA
extends java.lang.Object

A feature transformer that projects vectors to a low-dimensional space using PCA.

param: k number of principal components

Constructor Summary

Constructors

Constructor and Description
PCA(int k)

Method Summary

Methods

Modifier and Type	Method and Description
PCAModel	fit(JavaRDD<Vector> sources) Java-friendly version of fit()
PCAModel	fit(RDD<Vector> sources) Computes a PCAModel that contains the principal components of the input vectors.
int	k()

Methods inherited from class java.lang.Object

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

Constructor Detail

PCA

public PCA(int k)

Method Detail

k

public int k()

fit

public PCAModel fit(RDD<Vector> sources)

Computes a PCAModel that contains the principal components of the input vectors.

Parameters:

sources - source vectors

Returns:

(undocumented)

fit

public PCAModel fit(JavaRDD<Vector> sources)

Java-friendly version of fit()

Parameters:

sources - (undocumented)

Returns:

(undocumented)