SciLib.Math
Class integerVector

java.lang.Object
  SciLib.Math.integerVector

public class integerVector
extends java.lang.Object

This class defines a dynamic vector of type intger.

Constructor Summary

integerVector()
Allocates an empty vector.

integerVector(int n)
Allocates a vector of size n with initiařized values 0.

integerVector(int[] vec)
Allocates a vector from the array vec.

integerVector(integerVector x)
Make a copy of the vector x.

Method Summary

void	add(int x) Add an element of value x to the vector.
void	append(integerVector x) Append an integerVector x to this vector
int	argmax() Compute the index of the maximum element in the vector.
int	argmin() Compute the index of the minimum element in the vector.
void	concat(integerVector x) Append a vector x to this vector
static integerVector	copy(integerVector x) Make a copy of the vector x.
static int	dot(integerVector i1, integerVector i2) compute the dot product of two sparse binary vector a sparse vectors.
static int	dot(integerVector i1, integerVector x, integerVector i2, integerVector y) compute the dot product of two sparse binary vector a sparse vectors.
int	elementAt(int i) return the value of vector at index i.
static integerVector	generate(int from, int to) create an integerVector that has elements from an integer "from" to an integer "to".
static integerVector	generateIndex(integerVector v) create integerVector that stores the indexes of the nonzero elements of a sparse vector .
static integerVector	generateIndex(integerVector v, integerVector val) create integerVector that stores the indexes of the nonzero elements of a sparse integerVector and stores them in val.
static integerVector	generateIndex(integerVector v, vector val) create integerVector that stores the indexes of the nonzero elements of a sparse vector and stores them in val.
static integerVector	generateIndex(vector v) create integerVector that stores the indexes of the nonzero elements of a sparse vector .
static integerVector	generateIndex(vector v, vector val) create integerVector that stores the indexes of the nonzero elements of a sparse vector and stores them in val.
int[]	getData() Make an intger array that contains all data of the vector.
int	max() return the maximum value of the vector.
int	min() return the minimum value of the vector.
void	minus(integerVector x) minus this vector with the vector x and store the result in this vector.
static integerVector	minus(integerVector x, integerVector y) minus two vector x, y.
static integerVector	ones(int n) Make a vector of length n whose elements have value 1.
void	print() Print all elements of the vector using System.out.
void	read(java.lang.String fileName) Read data from a file to an integer vector.
void	resize(int n) Change the size of the vector to n.
void	setElementAt(int x, int i) change the value of element at index i with the integer x.
int	size() Return the length of the vector.
double	squareDistance(integerVector x) compute the square distance between this point vector to a vector x
static double	squareDistance(integerVector x, integerVector y) compute the square distance between to point vector
int	squareNorm() return the square of the norm of the vector.
static int	squareNorm(integerVector index, integerVector val) return the square of the norm of the vector.
integerVector	subvector(int from) make a vector whose elements are equal to elements of this vector with the indexes from an integer "from" to the end of this vector.
integerVector	subvector(int from, int to) Make a vector whose elements are equal to elements of this vector with the indexes from an integer "from" to an intger "to".
java.lang.String	toString() create a String that contains the elements of the vector.
void	translate(int s) plus all elements of the vector with an integer factor s.
void	trimToSize() Remove all the unused elements of the vector.
void	write(java.lang.String fileName) write an integerVector to a file
static integerVector	zeros(int n) Make a vector of length n whose elements have value 0.

Methods inherited from class java.lang.Object

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

Constructor Detail

integerVector

public integerVector()

Allocates an empty vector.

integerVector

public integerVector(int n)

Allocates a vector of size n with initiařized values 0.

Parameters:

n - The length of the vector

integerVector

public integerVector(int[] vec)

Allocates a vector from the array vec.

Parameters:

vec - An array of type double

integerVector

public integerVector(integerVector x)

Make a copy of the vector x.

Parameters:

x - An integerVector

Method Detail

copy

public static integerVector copy(integerVector x)

Make a copy of the vector x.

Parameters:

x - An integerVector

add

public void add(int x)

Add an element of value x to the vector.

Parameters:

x - An integer value

append

public void append(integerVector x)

Append an integerVector x to this vector

Parameters:

x - A vector

argmax

public final int argmax()

Compute the index of the maximum element in the vector.

Returns:

An integer

argmin

public final int argmin()

Compute the index of the minimum element in the vector.

Returns:

An integer

concat

public void concat(integerVector x)

Append a vector x to this vector

Parameters:

x - A vector

elementAt

public int elementAt(int i)
              throws java.lang.ArrayIndexOutOfBoundsException

return the value of vector at index i.

Parameters:

i - An integer

Throws:

java.lang.ArrayIndexOutOfBoundsException

generate

public static integerVector generate(int from,
                                     int to)

create an integerVector that has elements from an integer "from" to an integer "to".

Parameters:

from - An integer

to - An integer

Returns:

A integerVector

generateIndex

public static integerVector generateIndex(vector v)

create integerVector that stores the indexes of the nonzero elements of a sparse vector .

Parameters:

v - A vector

Returns:

An integerVector

generateIndex

public static integerVector generateIndex(integerVector v)

create integerVector that stores the indexes of the nonzero elements of a sparse vector .

Parameters:

v - An integerVector

Returns:

An integerVector

generateIndex

public static integerVector generateIndex(integerVector v,
                                          vector val)

create integerVector that stores the indexes of the nonzero elements of a sparse vector and stores them in val.

Parameters:

v - An integerVector

val - A vector

Returns:

An integerVector

generateIndex

public static integerVector generateIndex(integerVector v,
                                          integerVector val)

create integerVector that stores the indexes of the nonzero elements of a sparse integerVector and stores them in val.

Parameters:

v - An integerVector

val - A integerVector

Returns:

An integerVector

generateIndex

public static integerVector generateIndex(vector v,
                                          vector val)

create integerVector that stores the indexes of the nonzero elements of a sparse vector and stores them in val.

Parameters:

v - An vector

val - A vector

Returns:

An integerVector

dot

public static int dot(integerVector i1,
                      integerVector x,
                      integerVector i2,
                      integerVector y)

compute the dot product of two sparse binary vector a sparse vectors.

Parameters:

i1 - stores indexes of nozero elements of x, An integerVector

x - an array of integers, An integerVector

i2 - stores indexes of nozero elements of y, An integerVector

y - an ayyar of integers, An integerVector

Returns:

An integer value

dot

public static int dot(integerVector i1,
                      integerVector i2)

compute the dot product of two sparse binary vector a sparse vectors.

Parameters:

i1 - stores indexes of nozero elements of x, An integerVector

i2 - stores indexes of nozero elements of y, An integerVector

Returns:

An integer value

getData

public int[] getData()

Make an intger array that contains all data of the vector.

Returns:

An intger array

max

public final int max()

return the maximum value of the vector.

Returns:

An integer value

min

public final int min()

return the minimum value of the vector.

Returns:

An integer value

minus

public void minus(integerVector x)
           throws SizeException

minus this vector with the vector x and store the result in this vector.

Parameters:

x - A integerVector

Throws:

SizeException

minus

public static integerVector minus(integerVector x,
                                  integerVector y)
                           throws SizeException

minus two vector x, y. The result is stored in a new vector

Parameters:

x - A integerVector

y - A integerVector

Returns:

A integerVector that is equal to x - y

Throws:

SizeException

ones

public static integerVector ones(int n)

Make a vector of length n whose elements have value 1.

print

public void print()

Print all elements of the vector using System.out.

resize

public void resize(int n)

Change the size of the vector to n.

Parameters:

n - The new length of the vector

setElementAt

public void setElementAt(int x,
                         int i)
                  throws java.lang.ArrayIndexOutOfBoundsException

change the value of element at index i with the integer x.

Parameters:

x - An integer value

i - An index integer

Throws:

java.lang.ArrayIndexOutOfBoundsException

size

public final int size()

Return the length of the vector.

Returns:

An integer

squareNorm

public final int squareNorm()

return the square of the norm of the vector.

Returns:

An integer value

squareNorm

public static int squareNorm(integerVector index,
                             integerVector val)

return the square of the norm of the vector.

Returns:

An integer value

squareDistance

public double squareDistance(integerVector x)

compute the square distance between this point vector to a vector x

Parameters:

x - A integerVector

Returns:

A double value

squareDistance

public static double squareDistance(integerVector x,
                                    integerVector y)

compute the square distance between to point vector

Parameters:

x - A integerVector

y - A integerVector

Returns:

A double value

subvector

public integerVector subvector(int from,
                               int to)

Make a vector whose elements are equal to elements of this vector with the indexes from an integer "from" to an intger "to".

Parameters:

from - start index

to - end index

Returns:

A vector

subvector

public integerVector subvector(int from)

make a vector whose elements are equal to elements of this vector with the indexes from an integer "from" to the end of this vector.

Parameters:

from - start index

Returns:

A vector

toString

public java.lang.String toString()

create a String that contains the elements of the vector.

Overrides:

toString in class java.lang.Object

Returns:

A String

translate

public void translate(int s)

plus all elements of the vector with an integer factor s.

Parameters:

s - A double value

trimToSize

public void trimToSize()

Remove all the unused elements of the vector.

zeros

public static integerVector zeros(int n)

Make a vector of length n whose elements have value 0.

Parameters:

n - An integer

write

public void write(java.lang.String fileName)

write an integerVector to a file

Parameters:

fileName - A String

read

public void read(java.lang.String fileName)

Read data from a file to an integer vector.

Parameters:

fileName - a String