mirror of
https://gitlab.com/libeigen/eigen.git
synced 2024-12-15 07:10:37 +08:00
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
|
|
// for linear algebra. Eigen itself is part of the KDE project.
|
|
//
|
|
// Copyright (C) 2008 Daniel Gomez Ferro <dgomezferro@gmail.com>
|
|
//
|
|
// Eigen is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 3 of the License, or (at your option) any later version.
|
|
//
|
|
// Alternatively, you can redistribute it and/or
|
|
// modify it under the terms of the GNU General Public License as
|
|
// published by the Free Software Foundation; either version 2 of
|
|
// the License, or (at your option) any later version.
|
|
//
|
|
// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License and a copy of the GNU General Public License along with
|
|
// Eigen. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
#include "main.h"
|
|
#include <Eigen/Sparse>
|
|
|
|
void test_sparse()
|
|
{
|
|
int rows = 4, cols = 4;
|
|
SparseMatrix<double> m(rows, cols);
|
|
|
|
m.startFill(rows);
|
|
m.fill(0, 2) = 2;
|
|
m.fill(1, 2) = 1;
|
|
m.fill(0, 3) = 5;
|
|
m.endFill();
|
|
|
|
m.coeffRef(0, 2) = 3;
|
|
VERIFY_RAISES_ASSERT( m.coeffRef(0, 0) = 5 );
|
|
VERIFY_IS_MUCH_SMALLER_THAN( m.coeff(0, 0), 0.000001 );
|
|
VERIFY_IS_MUCH_SMALLER_THAN( m.coeff(0, 1), 0.000001 );
|
|
VERIFY_IS_MUCH_SMALLER_THAN( m.coeff(2, 1), 0.000001 );
|
|
VERIFY_IS_APPROX( m.coeff(0, 2), 3.0 );
|
|
VERIFY_IS_APPROX( m.coeff(1, 2), 1.0 );
|
|
VERIFY_IS_APPROX( m.coeff(0, 3), 5.0 );
|
|
|
|
Matrix4d dm;
|
|
double r;
|
|
m.startFill(rows*cols);
|
|
for(int i=0; i<cols; i++) {
|
|
for(int j=0; j<rows; j++) {
|
|
r = rand();
|
|
m.fill(j, i) = r;
|
|
dm(j, i) = r;
|
|
}
|
|
}
|
|
m.endFill();
|
|
|
|
for(int i=0; i<cols; i++) {
|
|
for(int j=0; j<rows; j++) {
|
|
VERIFY_IS_APPROX( m.coeff(j, i), dm(j, i) );
|
|
}
|
|
}
|
|
}
|