ch.akuhn.matrix

Class DenseVector

java.lang.Object

ch.akuhn.matrix.Vector

ch.akuhn.matrix.DenseVector

public class DenseVector
extends Vector

A dense vector

Author:

Adrian Kuhn

Nested Class Summary

Nested classes/interfaces inherited from class ch.akuhn.matrix.Vector

Vector.Entry

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DenseVector(double[] values)
protected	DenseVector(int size)

Method Summary

Modifier and Type	Method and Description
double	cosine(DenseVector other) Cosine of angle between this and another vector
boolean	equals(Vector v, double epsilon) Test for equality
double	get(int index) Get the value at the given index
double	norm() Compute the L2 norm
double	put(int index, double value) Set the value at an index
int	size()
Vector	times(double scalar) Multiply by a constant, creating a new vector
Vector	timesEquals(double scalar) Multiply by a constant in-place
double[]	unwrap()

Methods inherited from class ch.akuhn.matrix.Vector

add, applyCentering, copy, dense, density, dot, entries, from, mean, scaleAndAddTo, sparse, storeOn, sum, toString, used, wrap

Methods inherited from class java.lang.Object

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

Constructor Detail

DenseVector

protected DenseVector(double[] values)

DenseVector

protected DenseVector(int size)

Method Detail

cosine

public double cosine(DenseVector other)

Cosine of angle between this and another vector

Parameters:

other -

Returns:

the cosine

get

public double get(int index)

Description copied from class: Vector

Get the value at the given index

Specified by:

get in class Vector

Returns:

the value

norm

public double norm()

Description copied from class: Vector

Compute the L2 norm

Overrides:

norm in class Vector

Returns:

the L2 norm

put

public double put(int index,
                  double value)

Description copied from class: Vector

Set the value at an index

Specified by:

put in class Vector

Returns:

the new value

size

public int size()

Specified by:

size in class Vector

Returns:

the length of the vector

times

public Vector times(double scalar)

Description copied from class: Vector

Multiply by a constant, creating a new vector

Specified by:

times in class Vector

Returns:

the vector

timesEquals

public Vector timesEquals(double scalar)

Description copied from class: Vector

Multiply by a constant in-place

Specified by:

timesEquals in class Vector

Returns:

this

equals

public boolean equals(Vector v,
                      double epsilon)

Description copied from class: Vector

Test for equality

Specified by:

equals in class Vector

Returns:

true if the same; false otherwise

unwrap

public double[] unwrap()

Overrides:

unwrap in class Vector

Returns:

an array