1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of NVIDIA CORPORATION nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
//! includes, system
#include <cmath>
#include <iostream>
#include <iomanip>
#include <vector>
#include <cassert>
#include <fstream>
#include <algorithm>
#include <map>
// includes, projcet
#include "matlab.h"
// namespace, unnamed
namespace {} // end namespace, unnamed
///////////////////////////////////////////////////////////////////////////////
//! Write a tridiagonal, symmetric matrix in vector representation and
//! it's eigenvalues
//! @param filename name of output file
//! @param d diagonal entries of the matrix
//! @param s superdiagonal entries of the matrix (len = n - 1)
//! @param eigenvals eigenvalues of the matrix
//! @param indices vector of len n containing the position of the eigenvalues
//! if these are sorted in ascending order
//! @param n size of the matrix
///////////////////////////////////////////////////////////////////////////////
void writeTridiagSymMatlab(const char *filename, float *d, float *s,
float *eigenvals, const unsigned int n) {
std::ofstream file(filename, std::ios::out);
// write diagonal entries
writeVectorMatlab(file, "d", d, n);
// write superdiagonal entries
writeVectorMatlab(file, "s", s, n - 1);
// write eigenvalues
writeVectorMatlab(file, "eigvals", eigenvals, n);
file.close();
}
|
