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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@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 "binary_library.h"
#include "stdio.h"
void demo_MatrixXd()
{
struct C_MatrixXd *matrix1, *matrix2, *result;
printf("*** demo_MatrixXd ***\n");
matrix1 = MatrixXd_new(3, 3);
MatrixXd_set_zero(matrix1);
MatrixXd_set_coeff(matrix1, 0, 1, 2.5);
MatrixXd_set_coeff(matrix1, 1, 0, 1.4);
printf("Here is matrix1:\n");
MatrixXd_print(matrix1);
matrix2 = MatrixXd_new(3, 3);
MatrixXd_multiply(matrix1, matrix1, matrix2);
printf("Here is matrix1*matrix1:\n");
MatrixXd_print(matrix2);
MatrixXd_delete(matrix1);
MatrixXd_delete(matrix2);
}
// this helper function takes a plain C array and prints it in one line
void print_array(double *array, int n)
{
struct C_Map_MatrixXd *m = Map_MatrixXd_new(array, 1, n);
Map_MatrixXd_print(m);
Map_MatrixXd_delete(m);
}
void demo_Map_MatrixXd()
{
struct C_Map_MatrixXd *map;
double array[5];
int i;
printf("*** demo_Map_MatrixXd ***\n");
for(i = 0; i < 5; ++i) array[i] = i;
printf("Initially, the array is:\n");
print_array(array, 5);
map = Map_MatrixXd_new(array, 5, 1);
Map_MatrixXd_add(map, map, map);
Map_MatrixXd_delete(map);
printf("Now the array is:\n");
print_array(array, 5);
}
int main()
{
demo_MatrixXd();
demo_Map_MatrixXd();
}
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