ru.sscc.util.data
Class DoubleSRefVector

java.lang.Object
  |
  +--ru.sscc.util.data.RealVector
        |
        +--ru.sscc.util.data.DoubleSRefVector

public final class DoubleSRefVector

extends RealVector

The implementation of RealVector vector based on double[] type container with indexing by short[] reference vector (the sign bit of reference entries is considered as the numeric bit).

See Also:

Serialized Form

Fields inherited from class ru.sscc.util.data.RealVector

index, length, step

Constructor Summary

DoubleSRefVector(double[] data, short[] ref)
Simple constructor (creates a vector based on all data entries indexed by a reference vector).

DoubleSRefVector(double[] data, short[] ref, int length, int index, int step)
General constructor.

Method Summary

double	add(int index, double value) Adds the value to the vector entry.
double	get(int index) Gets the value of a vector entry.
RealPointer	getPointer() Gets a pointer to the beginning of the real data vector with the unit increment.
double	mul(int index, double value) Multiplies the vector entry by the value.
double	set(int index, double value) Sets the value of a vector entry.
RealVector	subvector(int index, int step, int length) Creates a subvector within the real data vector.

Methods inherited from class ru.sscc.util.data.RealVector

addVector, addVector, assign, assign, assign, assign, assign, assign, by, by, ensureLength, getPointer, inc, indexOfNormMax, indexOfNormMax, innerProduct, innerProduct, multiply, multiply, norm, norm, normMax, normMax, normSum, normSum, pos, swap, weightedNorm, weightedNorm, weightedNormMax, weightedNormMax, weightedNormSum, weightedNormSum, weightedProduct, weightedProduct

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleSRefVector

public DoubleSRefVector(double[] data,
                        short[] ref)

Simple constructor (creates a vector based on all data entries indexed by a reference vector).

Parameters:

data - a data container

ref - a reference vector

DoubleSRefVector

public DoubleSRefVector(double[] data,
                        short[] ref,
                        int length,
                        int index,
                        int step)

General constructor.

Parameters:

data - a data container

ref - a reference vector

length - a vector length

index - a starting index in the reference vector

step - an increment step in the reference vector

Method Detail

get

public double get(int index)

Gets the value of a vector entry.

Overrides:

get in class RealVector

Parameters:

index - an entry position in the vector

Returns:

an entry value at the required position

set

public double set(int index,
                  double value)

Sets the value of a vector entry.

Overrides:

set in class RealVector

Parameters:

index - an entry position in the vector

value - a value to set

Returns:

the set value

add

public double add(int index,
                  double value)

Adds the value to the vector entry.

Overrides:

add in class RealVector

Parameters:

index - the entry position in the container

value - the value to add

Returns:

the result of addition

mul

public double mul(int index,
                  double value)

Multiplies the vector entry by the value.

Overrides:

mul in class RealVector

Parameters:

index - the entry position in the container

value - the value to multiply

Returns:

the result of multiplication

getPointer

public RealPointer getPointer()

Gets a pointer to the beginning of the real data vector with the unit increment.

Overrides:

getPointer in class RealVector

subvector

public RealVector subvector(int index,
                            int step,
                            int length)

Creates a subvector within the real data vector.

Overrides:

subvector in class RealVector

Parameters:

index - a starting index

step - an increment step

length - a length of the subvector