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66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#include "binary_library.h"
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#include "stdio.h"
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void demo_MatrixXd()
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{
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struct C_MatrixXd *matrix1, *matrix2, *result;
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printf("*** demo_MatrixXd ***\n");
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matrix1 = MatrixXd_new(3, 3);
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MatrixXd_set_zero(matrix1);
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MatrixXd_set_coeff(matrix1, 0, 1, 2.5);
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MatrixXd_set_coeff(matrix1, 1, 0, 1.4);
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printf("Here is matrix1:\n");
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MatrixXd_print(matrix1);
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matrix2 = MatrixXd_new(3, 3);
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MatrixXd_multiply(matrix1, matrix1, matrix2);
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printf("Here is matrix1*matrix1:\n");
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MatrixXd_print(matrix2);
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MatrixXd_delete(matrix1);
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MatrixXd_delete(matrix2);
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}
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// this helper function takes a plain C array and prints it in one line
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void print_array(double *array, int n)
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{
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struct C_Map_MatrixXd *m = Map_MatrixXd_new(array, 1, n);
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Map_MatrixXd_print(m);
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Map_MatrixXd_delete(m);
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}
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void demo_Map_MatrixXd()
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{
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struct C_Map_MatrixXd *map;
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double array[5];
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int i;
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printf("*** demo_Map_MatrixXd ***\n");
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for(i = 0; i < 5; ++i) array[i] = i;
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printf("Initially, the array is:\n");
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print_array(array, 5);
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map = Map_MatrixXd_new(array, 5, 1);
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Map_MatrixXd_add(map, map, map);
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Map_MatrixXd_delete(map);
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printf("Now the array is:\n");
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print_array(array, 5);
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}
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int main()
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{
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demo_MatrixXd();
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demo_Map_MatrixXd();
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}
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