|
|
// This file is triangularView of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008-2009 Gael Guennebaud <gael.guennebaud@inria.fr>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "main.h"
template<typename MatrixType> void bandmatrix(const MatrixType& _m) { typedef typename MatrixType::Scalar Scalar; typedef typename NumTraits<Scalar>::Real RealScalar; typedef Matrix<Scalar,Dynamic,Dynamic> DenseMatrixType;
Index rows = _m.rows(); Index cols = _m.cols(); Index supers = _m.supers(); Index subs = _m.subs();
MatrixType m(rows,cols,supers,subs);
DenseMatrixType dm1(rows,cols); dm1.setZero();
m.diagonal().setConstant(123); dm1.diagonal().setConstant(123); for (int i=1; i<=m.supers();++i) { m.diagonal(i).setConstant(static_cast<RealScalar>(i)); dm1.diagonal(i).setConstant(static_cast<RealScalar>(i)); } for (int i=1; i<=m.subs();++i) { m.diagonal(-i).setConstant(-static_cast<RealScalar>(i)); dm1.diagonal(-i).setConstant(-static_cast<RealScalar>(i)); } //std::cerr << m.m_data << "\n\n" << m.toDense() << "\n\n" << dm1 << "\n\n\n\n";
VERIFY_IS_APPROX(dm1,m.toDenseMatrix());
for (int i=0; i<cols; ++i) { m.col(i).setConstant(static_cast<RealScalar>(i+1)); dm1.col(i).setConstant(static_cast<RealScalar>(i+1)); } Index d = (std::min)(rows,cols); Index a = std::max<Index>(0,cols-d-supers); Index b = std::max<Index>(0,rows-d-subs); if(a>0) dm1.block(0,d+supers,rows,a).setZero(); dm1.block(0,supers+1,cols-supers-1-a,cols-supers-1-a).template triangularView<Upper>().setZero(); dm1.block(subs+1,0,rows-subs-1-b,rows-subs-1-b).template triangularView<Lower>().setZero(); if(b>0) dm1.block(d+subs,0,b,cols).setZero(); //std::cerr << m.m_data << "\n\n" << m.toDense() << "\n\n" << dm1 << "\n\n";
VERIFY_IS_APPROX(dm1,m.toDenseMatrix());
}
using StormEigen::internal::BandMatrix;
void test_bandmatrix() { for(int i = 0; i < 10*g_repeat ; i++) { Index rows = internal::random<Index>(1,10); Index cols = internal::random<Index>(1,10); Index sups = internal::random<Index>(0,cols-1); Index subs = internal::random<Index>(0,rows-1); CALL_SUBTEST(bandmatrix(BandMatrix<float>(rows,cols,sups,subs)) ); } }
|