org.ejml.dense.row.decomposition.chol.CholeskyDecomposition_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.chol;
import org.ejml.EjmlParameters;
import org.ejml.data.Complex_F64;
import org.ejml.data.DMatrixRBlock;
import org.ejml.data.DMatrixRMaj;
import org.ejml.dense.block.MatrixOps_DDRB;
import org.ejml.dense.block.decomposition.chol.CholeskyOuterForm_DDRB;
import org.ejml.dense.row.decomposition.BaseDecomposition_DDRB_to_DDRM;
import org.ejml.interfaces.decomposition.CholeskyDecomposition_F64;
/**
* Wrapper around {@link org.ejml.dense.block.decomposition.chol.CholeskyOuterForm_DDRB} that allows
* it to process DMatrixRMaj.
*
* @author Peter Abeles
*/
public class CholeskyDecomposition_DDRB_to_DDRM
extends BaseDecomposition_DDRB_to_DDRM implements CholeskyDecomposition_F64 {
public CholeskyDecomposition_DDRB_to_DDRM(boolean lower) {
super(new CholeskyOuterForm_DDRB(lower), EjmlParameters.BLOCK_WIDTH);
}
@Override
public boolean isLower() {
return ((CholeskyOuterForm_DDRB)alg).isLower();
}
@Override
public DMatrixRMaj getT(DMatrixRMaj T) {
DMatrixRBlock T_block = ((CholeskyOuterForm_DDRB)alg).getT(null);
if( T == null ) {
T = new DMatrixRMaj(T_block.numRows,T_block.numCols);
}
MatrixOps_DDRB.convert(T_block,T);
// todo set zeros
return T;
}
@Override
public Complex_F64 computeDeterminant() {
return ((CholeskyOuterForm_DDRB)alg).computeDeterminant();
}
}