org.ejml.dense.row.decomposition.qr.QRDecomposition_DDRB_to_DDRM Maven / Gradle / Ivy
/*
* Copyright (c) 2009-2017, Peter Abeles. All Rights Reserved.
*
* This file is part of Efficient Java Matrix Library (EJML).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.ejml.dense.row.decomposition.qr;
import org.ejml.EjmlParameters;
import org.ejml.data.DMatrixRBlock;
import org.ejml.data.DMatrixRMaj;
import org.ejml.dense.block.MatrixOps_DDRB;
import org.ejml.dense.block.decomposition.qr.QRDecompositionHouseholder_DDRB;
import org.ejml.dense.row.CommonOps_DDRM;
import org.ejml.dense.row.decomposition.BaseDecomposition_DDRB_to_DDRM;
import org.ejml.interfaces.decomposition.QRDecomposition;
/**
* Wrapper that allows {@link QRDecomposition}(DMatrixRBlock) to be used
* as a {@link QRDecomposition}(DMatrixRMaj).
*
* @author Peter Abeles
*/
public class QRDecomposition_DDRB_to_DDRM
extends BaseDecomposition_DDRB_to_DDRM implements QRDecomposition {
public QRDecomposition_DDRB_to_DDRM() {
super(new QRDecompositionHouseholder_DDRB(), EjmlParameters.BLOCK_WIDTH);
}
@Override
public DMatrixRMaj getQ(DMatrixRMaj Q, boolean compact) {
int minLength = Math.min(Ablock.numRows,Ablock.numCols);
if( Q == null ) {
if( compact ) {
Q = new DMatrixRMaj(Ablock.numRows,minLength);
CommonOps_DDRM.setIdentity(Q);
} else {
Q = new DMatrixRMaj(Ablock.numRows,Ablock.numRows);
CommonOps_DDRM.setIdentity(Q);
}
}
DMatrixRBlock Qblock = new DMatrixRBlock();
Qblock.numRows = Q.numRows;
Qblock.numCols = Q.numCols;
Qblock.blockLength = blockLength;
Qblock.data = Q.data;
((QRDecompositionHouseholder_DDRB)alg).getQ(Qblock,compact);
convertBlockToRow(Q.numRows,Q.numCols,Ablock.blockLength,Q.data);
return Q;
}
@Override
public DMatrixRMaj getR(DMatrixRMaj R, boolean compact) {
DMatrixRBlock Rblock;
Rblock = ((QRDecompositionHouseholder_DDRB)alg).getR(null,compact);
if( R == null ) {
R = new DMatrixRMaj(Rblock.numRows,Rblock.numCols);
}
MatrixOps_DDRB.convert(Rblock,R);
return R;
}
}