org.apache.spark.mllib.linalg

Class Vectors

Object

org.apache.spark.mllib.linalg.Vectors

public class Vectors
extends Object

Constructor Summary

Constructors

Constructor and Description
Vectors()

Method Summary

Methods

Modifier and Type	Method and Description
static Vector	dense(double[] values) Creates a dense vector from a double array.
static Vector	dense(double firstValue, double... otherValues) Creates a dense vector from its values.
static Vector	dense(double firstValue, scala.collection.Seq<Object> otherValues) Creates a dense vector from its values.
static boolean	equals(scala.collection.IndexedSeq<Object> v1Indices, double[] v1Values, scala.collection.IndexedSeq<Object> v2Indices, double[] v2Values) Check equality between sparse/dense vectors
static Vector	fromBreeze(breeze.linalg.Vector<Object> breezeVector) Creates a vector instance from a breeze vector.
static double	norm(Vector vector, double p) Returns the p-norm of this vector.
static Vector	parse(String s) Parses a string resulted from Vector.toString into a Vector.
static Vector	parseNumeric(Object any)
static Vector	sparse(int size, int[] indices, double[] values) Creates a sparse vector providing its index array and value array.
static Vector	sparse(int size, Iterable<scala.Tuple2<Integer,Double>> elements) Creates a sparse vector using unordered (index, value) pairs in a Java friendly way.
static Vector	sparse(int size, scala.collection.Seq<scala.Tuple2<Object,Object>> elements) Creates a sparse vector using unordered (index, value) pairs.
static double	sqdist(SparseVector v1, DenseVector v2) Returns the squared distance between DenseVector and SparseVector.
static double	sqdist(Vector v1, Vector v2) Returns the squared distance between two Vectors.
static Vector	zeros(int size) Creates a vector of all zeros.

Methods inherited from class Object

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

Constructor Detail

Vectors

public Vectors()

Method Detail

dense

public static Vector dense(double firstValue,
           double... otherValues)

Creates a dense vector from its values.

dense

public static Vector dense(double firstValue,
           scala.collection.Seq<Object> otherValues)

Creates a dense vector from its values.

dense

public static Vector dense(double[] values)

Creates a dense vector from a double array.

sparse

public static Vector sparse(int size,
            int[] indices,
            double[] values)

Creates a sparse vector providing its index array and value array.

Parameters:

size - vector size.

indices - index array, must be strictly increasing.

values - value array, must have the same length as indices.

sparse

public static Vector sparse(int size,
            scala.collection.Seq<scala.Tuple2<Object,Object>> elements)

Creates a sparse vector using unordered (index, value) pairs.

Parameters:

size - vector size.

elements - vector elements in (index, value) pairs.

sparse

public static Vector sparse(int size,
            Iterable<scala.Tuple2<Integer,Double>> elements)

Creates a sparse vector using unordered (index, value) pairs in a Java friendly way.

Parameters:

size - vector size.

elements - vector elements in (index, value) pairs.

zeros

public static Vector zeros(int size)

Creates a vector of all zeros.

Parameters:

size - vector size

Returns:

a zero vector

parse

public static Vector parse(String s)

Parses a string resulted from Vector.toString into a Vector.

parseNumeric

public static Vector parseNumeric(Object any)

fromBreeze

public static Vector fromBreeze(breeze.linalg.Vector<Object> breezeVector)

Creates a vector instance from a breeze vector.

norm

public static double norm(Vector vector,
          double p)

Returns the p-norm of this vector.

Parameters:

vector - input vector.

p - norm.

Returns:

norm in L^p^ space.

sqdist

public static double sqdist(Vector v1,
            Vector v2)

Returns the squared distance between two Vectors.

Parameters:

v1 - first Vector.

v2 - second Vector.

Returns:

squared distance between two Vectors.

sqdist

public static double sqdist(SparseVector v1,
            DenseVector v2)

Returns the squared distance between DenseVector and SparseVector.

equals

public static boolean equals(scala.collection.IndexedSeq<Object> v1Indices,
             double[] v1Values,
             scala.collection.IndexedSeq<Object> v2Indices,
             double[] v2Values)

Check equality between sparse/dense vectors