/usr/include/linbox/blackbox/random-matrix.h is in liblinbox-dev 1.4.2-5build1.
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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 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | /* Copyright (C) 2010 LinBox
* Author: Zhendong Wan
*
*
*
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*/
#ifndef __LINBOX_blackbox_random_matrix_H
#define __LINBOX_blackbox_random_matrix_H
#include "linbox/blackbox/blackbox-interface.h"
#include "linbox/matrix/sparse-matrix.h"
namespace LinBox
{
class RandomMatrix : public BlackboxInterface {
public:
/** Generates random matrices used in EGV and EGV+ algorithm.
* [I, R] or [I, R]^t, where R is a random matrix.
* General case.
*/
template <class Blackbox, class Field>
static Blackbox*& randomMatrix (Blackbox* &, const Field& f,
int rowdim, int coldim);
// constructor a random dense matrix, whose entries are random
template<class Field>
static BlasMatrix<Field>*& randomMatrix( BlasMatrix<Field>*& Ap,
const Field& f,
int rowdim, int coldim )
{
Ap = new BlasMatrix<Field>(f, (size_t)rowdim, (size_t)coldim);
typename BlasMatrix<Field>::Iterator Ap_p;
typename Field::Element elt;
for (Ap_p = Ap -> Begin(); Ap_p != Ap -> End(); ++ Ap_p)
f. assign (*Ap_p, f.zero);
if (rowdim < coldim)
for (int i = 0; i < rowdim; ++ i) {
Ap -> setEntry ((size_t)i,(size_t) i, f.one);
for (int j = rowdim; j < coldim; ++ j){
f. init (elt, (uint64_t)(rand()%10));
Ap -> setEntry ((size_t)i, (size_t)j, elt);
}
}
else
for (int i = 0; i < coldim; ++ i) {
Ap -> setEntry ((size_t)i,(size_t) i, f.one);
for (int j = coldim; j < rowdim; ++ j) {
f. init (elt, (uint64_t)(rand()%10));
Ap -> setEntry ((size_t)j,(size_t) i, elt);
}
}
return Ap;
}
// constructor a very special random sparse matrix
// [I, R] or [I, R]^t, where R is a sparse random matrix.
template<class Field>
static SparseMatrix<Field>*& randomMatrix( SparseMatrix<Field>*& Ap,
const Field& f,
int rowdim, int coldim)
{
Ap = new SparseMatrix<Field>(f, (size_t)rowdim, (size_t)coldim);
const int m = rowdim < coldim ? rowdim : coldim;
int i, j, k;
typename Field::Element elt;
f. assign(elt, f.one);
for ( i = 0; i < m; ++ i)
Ap -> setEntry ((size_t)i, (size_t)i, elt);
if ( m < rowdim ) {
const int repeat = (rowdim - m) < 10 ? rowdim - m : 10;
for ( i = m; i < rowdim; ++ i) {
for ( k = 0; k < repeat; ++ k) {
j = rand() % coldim;
f.init(elt, rand() % 10 + 1);
Ap -> setEntry ((size_t)i, (size_t)j, elt);
}
}
}
else if ( m < coldim ) {
int offset = coldim - m;
const int repeat = offset < 10 ? offset : 10;
for ( i = 0; i < rowdim; ++ i){
for ( k = 0; k < repeat; ++ k) {
j = rand() % offset + m;
f.init(elt, rand() % 10 + 1);
Ap -> setEntry ((size_t)i, (size_t)j, elt);
}
}
}
else {}
return Ap;
}
template<typename _Tp1>
struct rebind {
typedef RandomMatrix other;
};
};
}
#endif //__LINBOX_blabbox_random_matrix_H
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