Package org.ejml.dense.row.factory

Class DecompositionFactory_ZDRM

java.lang.Object

org.ejml.dense.row.factory.DecompositionFactory_ZDRM

public class DecompositionFactory_ZDRM
extends Object

Contains operations related to creating and evaluating the quality of common matrix decompositions. Except in specialized situations, matrix decompositions should be instantiated from this factory instead of being directly constructed. Low level implementations are more prone to changes and new algorithms will be automatically placed here.

Constructor Summary

Constructors

Constructor	Description
DecompositionFactory_ZDRM()

Method Summary

Modifier and Type	Method	Description
static CholeskyDecomposition_F64<ZMatrixRMaj>	chol(int size, boolean lower)	Returns a CholeskyDecomposition_F64 that has been optimized for the specified matrix size.
static boolean	decomposeSafe(DecompositionInterface<ZMatrixRMaj> decomposition, ZMatrixRMaj a)	Decomposes the input matrix 'a' and makes sure it isn't modified.
static LUDecomposition_F64<ZMatrixRMaj>	lu(int numRows, int numCols)	Returns a LUDecomposition that has been optimized for the specified matrix size.
static QRDecomposition<ZMatrixRMaj>	qr(int numRows, int numCols)	Returns a QRDecomposition that has been optimized for the specified matrix size.

Methods inherited from class java.lang.Object

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

Constructor Details

DecompositionFactory_ZDRM

public DecompositionFactory_ZDRM()

Method Details

lu

public static LUDecomposition_F64<ZMatrixRMaj> lu(int numRows,
 int numCols)

Returns a LUDecomposition that has been optimized for the specified matrix size.

Parameters:

numRows - Number of rows the returned decomposition is optimized for.

numCols - Number of columns that the returned decomposition is optimized for.

Returns:

LUDecomposition

qr

public static QRDecomposition<ZMatrixRMaj> qr(int numRows,
 int numCols)

Returns a QRDecomposition that has been optimized for the specified matrix size.

Parameters:

numRows - Number of rows the returned decomposition is optimized for.

numCols - Number of columns that the returned decomposition is optimized for.

Returns:

QRDecomposition

chol

public static CholeskyDecomposition_F64<ZMatrixRMaj> chol(int size,
 boolean lower)

Returns a CholeskyDecomposition_F64 that has been optimized for the specified matrix size.

Parameters:

size - Number of rows and columns it should be optimized for

lower - if true then it will be a lower cholesky. false for upper. Try lower.

Returns:

QRDecomposition

decomposeSafe

public static boolean decomposeSafe(DecompositionInterface<ZMatrixRMaj> decomposition,
 ZMatrixRMaj a)

Decomposes the input matrix 'a' and makes sure it isn't modified.