weka.classifiers.functions.pace
Class DoubleVector

java.lang.Object
  weka.classifiers.functions.pace.DoubleVector

All Implemented Interfaces:

java.lang.Cloneable

public class DoubleVector

extends java.lang.Object

implements java.lang.Cloneable

Field Summary

private int	sizeOfVector
(package private) double[]	V

Constructor Summary

DoubleVector()
Constructs a null vector.

DoubleVector(double[] v)
Constructs a vector directly from a double array

DoubleVector(int n)
Constructs an n-vector of zeros.

DoubleVector(int n, double s)
Constructs a constant n-vector.

Method Summary

void	addElement(double x) Adds an element into the vector
int	capacity() Gets the capacity of the vector.
DoubleVector	cat(DoubleVector v) Combine two vectors together
java.lang.Object	clone() Clones the DoubleVector object.
DoubleVector	copy() Makes a deep copy of the vector
DoubleVector	cumulate() Returns a vector that stores the cumulated values of the original vector
DoubleVector	cumulateInPlace() Cumulates the original vector in place
DoubleVector	dividedBy(DoubleVector v) Divided by another DoubleVector element by element
DoubleVector	dividedByEquals(DoubleVector v) Divided by another DoubleVector element by element in place
double	get(int i) Gets a single element.
(package private) double[]	getArray() Access the internal one-dimensional array.
double[]	getArrayCopy() Returns a copy of the DoubleVector usng a double array.
int	indexOfMax() Returns the index of the maximum.
double	innerProduct(DoubleVector v) Returns the inner product of two DoubleVectors
boolean	isEmpty() Checks if it is an empty vector
static void	main(java.lang.String[] args)
DoubleVector	map(java.lang.String className, java.lang.String method) Applies a method to the vector
double	max() Returns the maximum value of all elements
DoubleVector	minus(double x) Subtracts a value
DoubleVector	minus(DoubleVector v) Subtracts another DoubleVector element by element
DoubleVector	minusEquals(double x) Subtracts a value in place
DoubleVector	minusEquals(DoubleVector v) Subtracts another DoubleVector element by element in place
double	norm1() Returns the L1-norm of the vector
double	norm2() Returns the L2-norm of the vector
DoubleVector	plus(double x) Adds a value to all the elements
DoubleVector	plus(DoubleVector v) Adds another vector element by element
DoubleVector	plusEquals(double x) Adds a value to all the elements in place
DoubleVector	plusEquals(DoubleVector v) Adds another vector in place element by element
static DoubleVector	random(int n) Returns a random vector of uniform distribution
DoubleVector	rev() Returns the reverse vector
void	set(double s) Set all elements to a value
void	set(DoubleVector v) Set the elements using a DoubleVector
void	set(int i, double s) Set a single element.
void	set(int i0, int i1, double s) Set some elements to a value
void	set(int i0, int i1, double[] v, int j0) Set some elements using a 2-D array
void	set(int i0, int i1, DoubleVector v, int j0) Set some elements using a DoubleVector.
(package private) void	setArray(double[] a)
void	setCapacity(int n) Sets the capacity of the vector
void	setPlus(int i, double s) Adds a value to an element
void	setSize(int m) Sets the size of the vector
void	setTimes(int i, double s) Multiplies a value to an element
DoubleVector	sign() Returns the signs of all elements in terms of -1, 0 and +1.
int	size() Gets the size of the vector.
void	sort() Sorts the array in place
IntVector	sortWithIndex() Sorts the array in place with index returned
void	sortWithIndex(int xi, int xj, IntVector index) Sorts the array in place with index changed
DoubleVector	sqrt() Returns the square-root of all the elements in the vector
DoubleVector	square() Returns the squared vector
DoubleVector	subvector(int i0, int i1) Returns a subvector.
DoubleVector	subvector(IntVector index) Returns a subvector.
double	sum() Returns the sum of all elements in the vector.
double	sum2() Returns the squared sum of all elements in the vector.
double	sum2(DoubleVector v) Returns ||u-v||^2
void	swap(int i, int j) Swaps the values stored at i and j
DoubleVector	times(double s) Multiplies a scalar
DoubleVector	times(DoubleVector v) Multiplies another DoubleVector element by element
DoubleVector	timesEquals(double s) Multiply a vector by a scalar in place, u = s * u
DoubleVector	timesEquals(DoubleVector v) Multiplies another DoubleVector element by element in place
java.lang.String	toString() Convert the DoubleVecor to a string
java.lang.String	toString(int digits, boolean trailing) Convert the DoubleVecor to a string
DoubleVector	unpivoting(IntVector index, int length) Returns a vector from the pivoting indices.
boolean	unsorted() Returns true if vector not sorted

Methods inherited from class java.lang.Object

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

Field Detail

V

double[] V

sizeOfVector

private int sizeOfVector

Constructor Detail

DoubleVector

public DoubleVector()

Constructs a null vector.

DoubleVector

public DoubleVector(int n)

Constructs an n-vector of zeros.

Parameters:

n - length.

DoubleVector

public DoubleVector(int n,
                    double s)

Constructs a constant n-vector.

Parameters:

n - length.

s - the scalar value used to fill the vector

DoubleVector

public DoubleVector(double[] v)

Constructs a vector directly from a double array

Parameters:

v - the array

Method Detail

set

public void set(int i,
                double s)

Set a single element.

Parameters:

i - Index.

s - a[i].

set

public void set(double s)

Set all elements to a value

Parameters:

s - the value

set

public void set(int i0,
                int i1,
                double s)

Set some elements to a value

Parameters:

i0 - the index of the first element

i1 - the index of the second element

s - the value

set

public void set(int i0,
                int i1,
                double[] v,
                int j0)

Set some elements using a 2-D array

Parameters:

i0 - the index of the first element

i1 - the index of the second element

j0 - the index of the starting element in the 2-D array

set

public void set(DoubleVector v)

Set the elements using a DoubleVector

Parameters:

v - the DoubleVector

set

public void set(int i0,
                int i1,
                DoubleVector v,
                int j0)

Set some elements using a DoubleVector.

Parameters:

i0 - the index of the first element

i1 - the index of the second element

v - the DoubleVector

j0 - the index of the starting element in the DoubleVector

getArray

double[] getArray()

Access the internal one-dimensional array.

Returns:

Pointer to the one-dimensional array of vector elements.

setArray

void setArray(double[] a)

getArrayCopy

public double[] getArrayCopy()

Returns a copy of the DoubleVector usng a double array.

Returns:

the one-dimensional array.

sort

public void sort()

Sorts the array in place

sortWithIndex

public IntVector sortWithIndex()

Sorts the array in place with index returned

sortWithIndex

public void sortWithIndex(int xi,
                          int xj,
                          IntVector index)

Sorts the array in place with index changed

Parameters:

xi - first index

xj - last index

index - array that stores all indices

size

public int size()

Gets the size of the vector.

Returns:

the size

setSize

public void setSize(int m)

Sets the size of the vector

Parameters:

m - the size

capacity

public int capacity()

Gets the capacity of the vector.

Returns:

the capacity.

setCapacity

public void setCapacity(int n)

Sets the capacity of the vector

Parameters:

n - the capacity.

get

public double get(int i)

Gets a single element.

Parameters:

i - Index.

Returns:

the value of the i-th element

setPlus

public void setPlus(int i,
                    double s)

Adds a value to an element

Parameters:

i - the index of the element

s - the value

setTimes

public void setTimes(int i,
                     double s)

Multiplies a value to an element

Parameters:

i - the index of the element

s - the value

addElement

public void addElement(double x)

Adds an element into the vector

Parameters:

x - the value of the new element

square

public DoubleVector square()

Returns the squared vector

sqrt

public DoubleVector sqrt()

Returns the square-root of all the elements in the vector

copy

public DoubleVector copy()

Makes a deep copy of the vector

clone

public java.lang.Object clone()

Clones the DoubleVector object.

innerProduct

public double innerProduct(DoubleVector v)

Returns the inner product of two DoubleVectors

Parameters:

v - the second DoubleVector

Returns:

the product

sign

public DoubleVector sign()

Returns the signs of all elements in terms of -1, 0 and +1.

sum

public double sum()

Returns the sum of all elements in the vector.

sum2

public double sum2()

Returns the squared sum of all elements in the vector.

norm1

public double norm1()

Returns the L1-norm of the vector

norm2

public double norm2()

Returns the L2-norm of the vector

sum2

public double sum2(DoubleVector v)

Returns ||u-v||^2

Parameters:

v - the second vector

subvector

public DoubleVector subvector(int i0,
                              int i1)

Returns a subvector.

Parameters:

i0 - the index of the first element

i1 - the index of the last element

Returns:

v[i0:i1]

subvector

public DoubleVector subvector(IntVector index)

Returns a subvector.

Parameters:

index - stores the indices of the needed elements

Returns:

v[index]

unpivoting

public DoubleVector unpivoting(IntVector index,
                               int length)

Returns a vector from the pivoting indices. Elements not indexed are set to zero.

Parameters:

index - stores the pivoting indices

length - the total number of the potential elements

Returns:

the subvector

plus

public DoubleVector plus(double x)

Adds a value to all the elements

Parameters:

x - the value

plusEquals

public DoubleVector plusEquals(double x)

Adds a value to all the elements in place

Parameters:

x - the value

plus

public DoubleVector plus(DoubleVector v)

Adds another vector element by element

Parameters:

v - the second vector

plusEquals

public DoubleVector plusEquals(DoubleVector v)

Adds another vector in place element by element

Parameters:

v - the second vector

minus

public DoubleVector minus(double x)

Subtracts a value

Parameters:

x - the value

minusEquals

public DoubleVector minusEquals(double x)

Subtracts a value in place

Parameters:

x - the value

minus

public DoubleVector minus(DoubleVector v)

Subtracts another DoubleVector element by element

Parameters:

v - the second DoubleVector

minusEquals

public DoubleVector minusEquals(DoubleVector v)

Subtracts another DoubleVector element by element in place

Parameters:

v - the second DoubleVector

times

public DoubleVector times(double s)

Multiplies a scalar

Parameters:

s - scalar

Returns:

s * v

timesEquals

public DoubleVector timesEquals(double s)

Multiply a vector by a scalar in place, u = s * u

Parameters:

s - scalar

Returns:

replace u by s * u

times

public DoubleVector times(DoubleVector v)

Multiplies another DoubleVector element by element

Parameters:

v - the second DoubleVector

timesEquals

public DoubleVector timesEquals(DoubleVector v)

Multiplies another DoubleVector element by element in place

Parameters:

v - the second DoubleVector

dividedBy

public DoubleVector dividedBy(DoubleVector v)

Divided by another DoubleVector element by element

Parameters:

v - the second DoubleVector

dividedByEquals

public DoubleVector dividedByEquals(DoubleVector v)

Divided by another DoubleVector element by element in place

Parameters:

v - the second DoubleVector

isEmpty

public boolean isEmpty()

Checks if it is an empty vector

cumulate

public DoubleVector cumulate()

Returns a vector that stores the cumulated values of the original vector

cumulateInPlace

public DoubleVector cumulateInPlace()

Cumulates the original vector in place

indexOfMax

public int indexOfMax()

Returns the index of the maximum.

If multiple maximums exist, the index of the first is returned.

unsorted

public boolean unsorted()

Returns true if vector not sorted

cat

public DoubleVector cat(DoubleVector v)

Combine two vectors together

Parameters:

v - the second vector

swap

public void swap(int i,
                 int j)

Swaps the values stored at i and j

Parameters:

i - the index i

j - the index j

max

public double max()

Returns the maximum value of all elements

map

public DoubleVector map(java.lang.String className,
                        java.lang.String method)

Applies a method to the vector

Parameters:

className - the class name

method - the method

rev

public DoubleVector rev()

Returns the reverse vector

random

public static DoubleVector random(int n)

Returns a random vector of uniform distribution

Parameters:

n - the size of the vector

toString

public java.lang.String toString()

Convert the DoubleVecor to a string

toString

public java.lang.String toString(int digits,
                                 boolean trailing)

Convert the DoubleVecor to a string

Parameters:

digits - the number of digits after decimal point

trailing - true if trailing zeros are to be shown

main

public static void main(java.lang.String[] args)