mikera.matrixx.impl

Class IdentityMatrix

java.lang.Object

mikera.transformz.ATransform

mikera.transformz.AAffineTransform

mikera.transformz.ALinearTransform

mikera.matrixx.AMatrix

mikera.matrixx.impl.ADiagonalMatrix

mikera.matrixx.impl.IdentityMatrix

All Implemented Interfaces:

Cloneable, Iterable<AVector>, INDArray, IMatrix

public class IdentityMatrix
extends ADiagonalMatrix

Specialised identity matrix class. Immutable.

Author:

Mike

Field Summary

Fields inherited from class mikera.matrixx.impl.ADiagonalMatrix

dimensions

Method Summary

Methods

Modifier and Type	Method and Description
double	calculateElement(int i, AVector v) Calculates a single element of the output.
AMatrix	compose(AMatrix a)
static IdentityMatrix	create(int i)
double	determinant() Calculates the determinant of the matrix.
double	get(int row, int column) Returns a specified element in the matrix
AVector	getLeadingDiagonal() Returns a new vector that contains the leading diagonal values of the matrix
AMatrix	getTranspose() Returns a transposed version of this matrix.
AMatrix	inverse() Return the inverse of this transformation if possible
boolean	isIdentity() Returns true if this transform is the identity function, i.e.
void	set(int row, int column, double value) Sets a specified element in the matrix
AVector	transform(AVector source) Transforms a vector, returning a new transformed vector
void	transform(AVector source, AVector dest) Transforms the source vector, storing the result in the given destination vector

Methods inherited from class mikera.matrixx.impl.ADiagonalMatrix

columnCount, dimensions, getDiagonalValue, isFullyMutable, isSquare, rowCount, transformInPlace, transposeInPlace

Methods inherited from class mikera.matrixx.AMatrix

add, addMultiple, asVector, clone, cloneRow, compose, composeWith, composeWith, copyOfMatrix, copyOfTranslationVector, dimensionality, elementSum, entrywiseMul, epsilonEquals, equals, equals, equals, get, getColumn, getMatrixComponent, getRow, hashCode, inputDimensions, isInvertible, isZeroMatrix, iterator, mul, outputDimensions, reshape, scale, set, sub, swapColumns, swapRows, toAffineTransform, toMutableMatrix, toString, toVector

Methods inherited from class mikera.transformz.ALinearTransform

getTranslationComponent, isLinear

Methods inherited from class mikera.transformz.AAffineTransform

compose, transformNormal

Methods inherited from class mikera.transformz.ATransform

takeComponents, takeComponents, takeComponents

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

create

public static IdentityMatrix create(int i)

calculateElement

public double calculateElement(int i,
                      AVector v)

Description copied from class: ATransform

Calculates a single element of the output. Not necessarily faster than calculating full output, but can be in some circumstances.

Overrides:

calculateElement in class ADiagonalMatrix

get

public double get(int row,
         int column)

Description copied from class: AMatrix

Returns a specified element in the matrix

Specified by:

get in interface IMatrix

Specified by:

get in class AMatrix

set

public void set(int row,
       int column,
       double value)

Description copied from class: AMatrix

Sets a specified element in the matrix

Specified by:

set in interface IMatrix

Overrides:

set in class ADiagonalMatrix

transform

public void transform(AVector source,
             AVector dest)

Description copied from class: ATransform

Transforms the source vector, storing the result in the given destination vector

Overrides:

transform in class AMatrix

transform

public AVector transform(AVector source)

Description copied from class: ATransform

Transforms a vector, returning a new transformed vector

Overrides:

transform in class ATransform

Returns:

getLeadingDiagonal

public AVector getLeadingDiagonal()

Description copied from class: AMatrix

Returns a new vector that contains the leading diagonal values of the matrix

Overrides:

getLeadingDiagonal in class AMatrix

Returns:

isIdentity

public boolean isIdentity()

Description copied from class: ATransform

Returns true if this transform is the identity function, i.e. it maps all vectors to themselves

Overrides:

isIdentity in class ADiagonalMatrix

inverse

public AMatrix inverse()

Description copied from class: ATransform

Return the inverse of this transformation if possible

Overrides:

inverse in class AMatrix

Returns:

determinant

public double determinant()

Description copied from class: AMatrix

Calculates the determinant of the matrix.

Overrides:

determinant in class ADiagonalMatrix

compose

public AMatrix compose(AMatrix a)

Overrides:

compose in class AMatrix

getTranspose

public AMatrix getTranspose()

Description copied from class: AMatrix

Returns a transposed version of this matrix. May or may not be a reference.

Overrides:

getTranspose in class AMatrix

Returns: