/**
* Copyright (C) 2009 - present by OpenGamma Inc. and the OpenGamma group of companies
*
* Please see distribution for license.
*/
package com.opengamma.strata.math.impl.linearalgebra;
import com.opengamma.strata.collect.array.DoubleMatrix;
/**
* Contains the results of QR matrix decomposition.
*/
public interface QRDecompositionResult extends DecompositionResult {
/**
* Returns the matrix $\mathbf{R}$ of the decomposition.
* <p>
* $\mathbf{R}$ is an upper-triangular matrix.
* @return the $\mathbf{R}$ matrix
*/
DoubleMatrix getR();
/**
* Returns the matrix $\mathbf{Q}$ of the decomposition.
* <p>
* $\mathbf{Q}$ is an orthogonal matrix.
* @return the $\mathbf{Q}$ matrix
*/
DoubleMatrix getQ();
/**
* Returns the transpose of the matrix $\mathbf{Q}$ of the decomposition.
* <p>
* $\mathbf{Q}$ is an orthogonal matrix.
* @return the $\mathbf{Q}$ matrix
*/
DoubleMatrix getQT();
}