org.jutil.math.matrix
Interface QRDecomposer

All Known Implementing Classes:

HouseholderQRDecomposer

public interface QRDecomposer

A class of objects that compute the QR factorization of a matrix.

Version:

$Revision: 1.3 $

Author:

Marko van Dooren

Field Summary

static java.lang.String

CVS_REVISION

Method Summary

QRDecomposition

decompose(Matrix matrix) public behavior pre matrix != null; pre matrix.getNbRows() >= matrix.getNbColumns(); post \result != null; post (* \result.Q().times(\result.R()).equals(matrix) *); post \result.R().getNbRows() == matrix.getNbRows(); post \result.R().getNbColumns() == matrix.getNbColumns();

Field Detail

CVS_REVISION

public static final java.lang.String CVS_REVISION

Method Detail

decompose

public QRDecomposition decompose(Matrix matrix)

public behavior

pre matrix != null;
pre matrix.getNbRows() >= matrix.getNbColumns();

post \result != null;
post (* \result.Q().times(\result.R()).equals(matrix) *);
post \result.R().getNbRows() == matrix.getNbRows();
post \result.R().getNbColumns() == matrix.getNbColumns();

Return a QR factorization of this matrix.

Parameters:

matrix - The matrix to decompose.