-
Notifications
You must be signed in to change notification settings - Fork 4
/
Matrix.h
181 lines (113 loc) · 2.89 KB
/
Matrix.h
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
170
171
172
173
174
175
176
177
178
179
180
181
/**
* @file Matrix.h
* @author Philip Salmony (pms67@cam.ac.uk)
* @date 10/12/2017
* @version 1.0
*
* @brief PiCNN, Matrix, 2D double container class
*
* @section DESCRIPTION
*
* The Matrix class is used to store double values in a 2D array.
*
*/
#ifndef MATRIX_H
#define MATRIX_H
#include <iostream>
#include <vector>
#include <random>
#include <ctime>
#include <sstream>
class Matrix {
int rows, cols;
std::vector<std::vector<double> > val;
public:
//Constructors
Matrix() {
rows = 0; cols = 0;
}
Matrix (int n) {
rows = n; cols = n;
resize();
}
Matrix (int r, int c) {
rows = r; cols = c;
resize();
}
//Operators
double& operator()(int row, int col) { return val[row][col]; }
const double& operator()(int row, int col) const { return val[row][col]; }
//Properties
int getRows() { return rows; }
int getCols() { return cols; }
//Functions
Matrix copy() {
Matrix mnew(rows, cols);
for (int i = 0; i < rows; i++)
for (int j = 0; j < cols; j++)
mnew(i, j) = val[i][j];
return mnew;
}
void resize() {
val.resize(rows);
for (int i = 0; i < rows; i++)
val[i].resize(cols);
clear();
return;
}
void resize(int rows, int cols) {
this->rows = rows;
this->cols = cols;
resize();
return;
}
void resize(int dim) {
resize(dim, dim);
return;
}
void clear() {
for (int i = 0; i < rows; i++)
for (int j = 0; j < cols; j++)
val[i][j] = 0;
return;
}
void set(double n) {
for (int i = 0; i < rows; i++)
for (int j = 0; j < cols; j++)
val[i][j] = n;
return;
}
void rand(float min, float max) {
std::default_random_engine generator;
std::uniform_real_distribution<double> distribution(min, max);
generator.seed(time(0));
for (int i = 0; i < rows; i++)
for (int j = 0; j < cols; j++)
val[i][j] = distribution(generator);
return;
}
void randn(float mean, float stddev) {
std::default_random_engine generator;
std::normal_distribution<double> distribution(mean, stddev);
generator.seed(time(0));
for (int i = 0; i < rows; i++)
for (int j = 0; j < cols; j++)
val[i][j] = distribution(generator);
return;
}
void print() {
if (rows == 0 && cols == 0)
return;
std::stringstream s;
for (int i = 0; i < rows; i ++) {
s << "[ ";
for (int j = 0; j < cols; j++) {
s << val[i][j] << " ";
}
s << "]" << std::endl;
}
std::cout << s.str();
return;
}
};
#endif