hiroya taura / Mbed 2 deprecated LAURUS_program

MPU6050のサンプルプログラム２

Dependencies:   ConfigFile SDFileSystem mbed

Fork of LAURUS_program by LAURUS

Matrix/Matrix.cpp@36:94dc027e05cd, 2015-12-07 (annotated)

Committer:
taurin
Date:
Mon Dec 07 02:11:56 2015 +0000
Revision:
36:94dc027e05cd
Parent:
23:79cdc1432160 
MPU?HMC??????ver

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ojan 3:5358a691a100 1 #include "myConstants.h"
ojan 3:5358a691a100 2 #include "Matrix.h"
ojan 3:5358a691a100 3
ojan 3:5358a691a100 4
ojan 3:5358a691a100 5
ojan 3:5358a691a100 6 Matrix::Matrix(int row, int col) : row(row), col(col), components(0) {
ojan 3:5358a691a100 7 components = new float[row*col];
ojan 23:79cdc1432160 8 if (!components) error("Memory Allocation Error");
ojan 3:5358a691a100 9 for(int i=0; i<row*col; i++) components[i] = 0.0f;
ojan 3:5358a691a100 10 if (row == col) {
ojan 3:5358a691a100 11 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 12 components[i * col + i] = 1.0f;
ojan 3:5358a691a100 13 }
ojan 3:5358a691a100 14 }
ojan 3:5358a691a100 15 }
ojan 3:5358a691a100 16
ojan 3:5358a691a100 17 Matrix::Matrix(int row, int col, float* comps) : row(row), col(col), components(0) {
ojan 3:5358a691a100 18 components = new float[row*col];
ojan 23:79cdc1432160 19 if (!components) error("Memory Allocation Error");
ojan 3:5358a691a100 20 memcpy(components, comps, sizeof(float)*row*col);
ojan 3:5358a691a100 21 }
ojan 3:5358a691a100 22
ojan 3:5358a691a100 23
ojan 3:5358a691a100 24 Matrix::~Matrix() {
ojan 3:5358a691a100 25 delete[] components;
ojan 3:5358a691a100 26 }
ojan 3:5358a691a100 27
ojan 3:5358a691a100 28 Matrix::Matrix(const Matrix& m) : row(m.row), col(m.col), components(0) {
ojan 3:5358a691a100 29 components = new float[row*col];
ojan 23:79cdc1432160 30 if (!components) error("Memory Allocation Error");
ojan 3:5358a691a100 31 memcpy(components, m.GetpComponents(), sizeof(float)*row*col);
ojan 3:5358a691a100 32 }
ojan 3:5358a691a100 33
ojan 3:5358a691a100 34 Matrix Matrix::operator-() const{
ojan 3:5358a691a100 35 Matrix retMat(*this);
ojan 3:5358a691a100 36
ojan 3:5358a691a100 37 for (int i = 0; i < row * col; i++) {
ojan 3:5358a691a100 38 retMat.components[i] = - this->components[i];
ojan 3:5358a691a100 39 }
ojan 3:5358a691a100 40
ojan 3:5358a691a100 41 return retMat;
ojan 3:5358a691a100 42 }
ojan 3:5358a691a100 43
ojan 3:5358a691a100 44 Matrix& Matrix::operator=(const Matrix& m) {
ojan 3:5358a691a100 45 if (this == &m) return *this;
ojan 3:5358a691a100 46 row = m.row;
ojan 3:5358a691a100 47 col = m.col;
ojan 3:5358a691a100 48 delete[] components;
ojan 3:5358a691a100 49 components = new float[row*col];
ojan 23:79cdc1432160 50 if (!components) error("Memory Allocation Error");
ojan 3:5358a691a100 51 memcpy(components, m.GetpComponents(), sizeof(float)*row*col);
ojan 3:5358a691a100 52
ojan 3:5358a691a100 53 return *this;
ojan 3:5358a691a100 54 }
ojan 3:5358a691a100 55
ojan 3:5358a691a100 56 Matrix& Matrix::operator+=(const Matrix& m) {
ojan 23:79cdc1432160 57 if (row != m.GetRow() || col != m.GetCol()) error("Irregular Dimention");
ojan 3:5358a691a100 58
ojan 3:5358a691a100 59 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 60 for (int j = 0; j < col; j++) {
ojan 3:5358a691a100 61 components[i * col + j] += m.components[i * col + j];
ojan 3:5358a691a100 62 }
ojan 3:5358a691a100 63 }
ojan 3:5358a691a100 64
ojan 3:5358a691a100 65 this->CleanUp();
ojan 3:5358a691a100 66
ojan 3:5358a691a100 67 return *this;
ojan 3:5358a691a100 68 }
ojan 3:5358a691a100 69
ojan 3:5358a691a100 70 Matrix& Matrix::operator-=(const Matrix& m) {
ojan 23:79cdc1432160 71 if (row != m.GetRow() || col != m.GetCol()) error("Irregular Dimention");
ojan 3:5358a691a100 72
ojan 3:5358a691a100 73 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 74 for (int j = 0; j < col; j++) {
ojan 3:5358a691a100 75 components[i * col + j] -= m.components[i * col + j];
ojan 3:5358a691a100 76 }
ojan 3:5358a691a100 77 }
ojan 3:5358a691a100 78
ojan 3:5358a691a100 79 this->CleanUp();
ojan 3:5358a691a100 80
ojan 3:5358a691a100 81 return *this;
ojan 3:5358a691a100 82 }
ojan 3:5358a691a100 83 /*
ojan 3:5358a691a100 84 Matrix& Matrix::operator*=(const Matrix& m) {
ojan 23:79cdc1432160 85 if (col != m.GetRow()) error("Irregular Dimention");
ojan 3:5358a691a100 86 Matrix temp = Matrix(*this);
ojan 3:5358a691a100 87
ojan 3:5358a691a100 88 col = m.GetCol();
ojan 3:5358a691a100 89 delete[] components;
ojan 3:5358a691a100 90 components = new float[row*col];
ojan 3:5358a691a100 91
ojan 3:5358a691a100 92 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 93 for (int j = 0; j < col; j++) {
ojan 3:5358a691a100 94 components[i*col + j] = 0.0f;
ojan 3:5358a691a100 95 for (int k = 0; k < m.GetRow(); k++) {
ojan 3:5358a691a100 96 components[i * col + j] += temp.components[i * col + k] * m.components[k * col + j];
ojan 3:5358a691a100 97 }
ojan 3:5358a691a100 98 }
ojan 3:5358a691a100 99 }
ojan 3:5358a691a100 100
ojan 3:5358a691a100 101 this->CleanUp();
ojan 3:5358a691a100 102
ojan 3:5358a691a100 103 return *this;
ojan 3:5358a691a100 104 }
ojan 3:5358a691a100 105 */
ojan 3:5358a691a100 106
ojan 3:5358a691a100 107 Matrix& Matrix::operator*=(float c) {
ojan 3:5358a691a100 108 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 109 for (int j = 0; j < col; j++) {
ojan 3:5358a691a100 110 components[i*col + j] *= c;
ojan 3:5358a691a100 111 }
ojan 3:5358a691a100 112 }
ojan 3:5358a691a100 113
ojan 3:5358a691a100 114 return *this;
ojan 3:5358a691a100 115 }
ojan 3:5358a691a100 116
ojan 3:5358a691a100 117 Matrix& Matrix::operator/=(float c) {
ojan 23:79cdc1432160 118 if (fabs(c) < NEARLY_ZERO) error("Division by Zero");
ojan 3:5358a691a100 119 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 120 for (int j = 0; j < col; j++) {
ojan 3:5358a691a100 121 components[i*col + j] /= c;
ojan 3:5358a691a100 122 }
ojan 3:5358a691a100 123 }
ojan 3:5358a691a100 124
ojan 3:5358a691a100 125 return *this;
ojan 3:5358a691a100 126 }
ojan 3:5358a691a100 127
ojan 3:5358a691a100 128 void Matrix::SetComp(int rowNo, int colNo, float val) {
ojan 23:79cdc1432160 129 if (rowNo > row || colNo > col) error("Index Out of Bounds Error");
ojan 3:5358a691a100 130 components[(rowNo-1)*col + (colNo-1)] = val;
ojan 3:5358a691a100 131 }
ojan 3:5358a691a100 132
ojan 3:5358a691a100 133 void Matrix::SetComps(float* pComps) {
ojan 3:5358a691a100 134 memcpy(components, pComps, sizeof(float) * row * col);
ojan 3:5358a691a100 135 }
ojan 3:5358a691a100 136
ojan 3:5358a691a100 137 float Matrix::Determinant() const{
ojan 23:79cdc1432160 138 if (row != col) error("failed to calculate det. : matrix is not square");
ojan 3:5358a691a100 139 int decSign = 0;
ojan 3:5358a691a100 140 float retVal = 1.0f;
ojan 3:5358a691a100 141
ojan 3:5358a691a100 142 // 行列のLU分解
ojan 3:5358a691a100 143 Matrix LU(this->LU_Decompose(&decSign));
ojan 3:5358a691a100 144
ojan 3:5358a691a100 145 for (int i = 0; i < LU.row; i++) {
ojan 3:5358a691a100 146 retVal *= LU.components[i * LU.col + i];
ojan 3:5358a691a100 147 }
ojan 3:5358a691a100 148
ojan 3:5358a691a100 149 return retVal*decSign;
ojan 3:5358a691a100 150 }
ojan 3:5358a691a100 151
ojan 3:5358a691a100 152 float Matrix::det() const {
ojan 23:79cdc1432160 153 if (row != col) error("failed to calculate det : matrix is not square");
ojan 3:5358a691a100 154
ojan 3:5358a691a100 155 Matrix temp(*this);
ojan 3:5358a691a100 156 int decSign = 1;
ojan 3:5358a691a100 157
ojan 3:5358a691a100 158 for (int j = 0; j < col - 1; j++) {
ojan 3:5358a691a100 159
ojan 3:5358a691a100 160 // 列内のみで最大の要素を探す
ojan 3:5358a691a100 161 int maxNo = j;
ojan 3:5358a691a100 162 for (int k = j; k < row; k++) {
ojan 3:5358a691a100 163 if (temp.components[maxNo * col + j] < temp.components[k * col + j]) maxNo = k;
ojan 3:5358a691a100 164 }
ojan 3:5358a691a100 165 if (maxNo != j) {
ojan 3:5358a691a100 166 temp.SwapRow(j + 1, maxNo + 1);
ojan 3:5358a691a100 167 decSign *= -1;
ojan 3:5358a691a100 168 }
ojan 3:5358a691a100 169 // 列内の最大要素が小さ過ぎる場合、行内の最大要素も探す
ojan 3:5358a691a100 170 if (fabs(temp.components[j * col + j]) < NEARLY_ZERO) {
ojan 3:5358a691a100 171 maxNo = j;
ojan 3:5358a691a100 172 for (int k = j; k < col; k++) {
ojan 3:5358a691a100 173 if (temp.components[j * col + maxNo] < temp.components[j * col + k])maxNo = k;
ojan 3:5358a691a100 174 }
ojan 3:5358a691a100 175 if (maxNo != j) {
ojan 3:5358a691a100 176 temp.SwapCol(j + 1, maxNo + 1);
ojan 3:5358a691a100 177 decSign *= -1;
ojan 3:5358a691a100 178 }
ojan 3:5358a691a100 179
ojan 3:5358a691a100 180 // 列内、行内の最大要素を選んでも小さすぎる場合はエラー
ojan 3:5358a691a100 181 if (fabs(temp.components[j * col + j]) < NEARLY_ZERO) {
ojan 23:79cdc1432160 182 if (row != col) error("failed to calculate det : Division by Zero");
ojan 3:5358a691a100 183 }
ojan 3:5358a691a100 184 }
ojan 3:5358a691a100 185
ojan 3:5358a691a100 186 float c1 = 1.0f / temp.components[j * col + j];
ojan 3:5358a691a100 187
ojan 3:5358a691a100 188 for (int i = j + 1; i < row; i++) {
ojan 3:5358a691a100 189 float c2 = temp.components[i * col + j] * c1;
ojan 3:5358a691a100 190 for (int k = j; k < col; k++) {
ojan 3:5358a691a100 191 temp.components[i * col + k] = temp.components[i * col + k] - c2 * temp.components[j * col + k];
ojan 3:5358a691a100 192 }
ojan 3:5358a691a100 193 }
ojan 3:5358a691a100 194
ojan 3:5358a691a100 195 }
ojan 3:5358a691a100 196
ojan 3:5358a691a100 197 if (fabs(temp.components[(row - 1) * col + (col - 1)]) < NEARLY_ZERO) return 0.0f;
ojan 3:5358a691a100 198
ojan 3:5358a691a100 199 float retVal = 1.0f;
ojan 3:5358a691a100 200 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 201 retVal *= temp.components[i * col + i];
ojan 3:5358a691a100 202 }
ojan 3:5358a691a100 203
ojan 3:5358a691a100 204 return retVal * decSign;
ojan 3:5358a691a100 205 }
ojan 3:5358a691a100 206
ojan 3:5358a691a100 207 Matrix Matrix::LU_Decompose(int* sign, Matrix* p) const{
ojan 23:79cdc1432160 208 if (row != col) error("failed to LU decomposition: matrix is not square");
ojan 3:5358a691a100 209 if (sign != 0) *sign = 1;
ojan 3:5358a691a100 210 if (p != 0) {
ojan 23:79cdc1432160 211 if (p->row != row || p->row != p->col) error("failed to LU decomposition: permitation matrix is incorrect");
ojan 3:5358a691a100 212 // 置換行列は最初に単位行列にしておく
ojan 3:5358a691a100 213 memset(p->components, 0, sizeof(float) * row * col);
ojan 3:5358a691a100 214 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 215 p->components[i * col + i] = 1.0f;
ojan 3:5358a691a100 216 }
ojan 3:5358a691a100 217 }
ojan 3:5358a691a100 218 Matrix retVal(*this);
ojan 3:5358a691a100 219
ojan 3:5358a691a100 220 for (int d = 0; d < row - 1; d++) { // 1行1列ずつ分解を行う
ojan 3:5358a691a100 221 // d列目の最大の要素を探索し、見つけた要素の行とd行目を交換する
ojan 3:5358a691a100 222 int maxNo = d;
ojan 3:5358a691a100 223 for (int i = d; i < row; i++) {
ojan 3:5358a691a100 224 if (retVal.components[i * col + d] > retVal.components[maxNo * col + d]) maxNo = i;
ojan 3:5358a691a100 225 }
ojan 3:5358a691a100 226 if (maxNo != d) {
ojan 3:5358a691a100 227 retVal.SwapRow(d + 1, maxNo + 1);
ojan 3:5358a691a100 228 if (sign != 0) *sign *= -1;
ojan 3:5358a691a100 229 if (p != 0) {
ojan 3:5358a691a100 230 p->SwapRow(d + 1, maxNo + 1);
ojan 3:5358a691a100 231 }
ojan 3:5358a691a100 232 }
ojan 3:5358a691a100 233 float c = retVal.components[d * col + d];
ojan 23:79cdc1432160 234 if (fabs(c) < NEARLY_ZERO) error("failed to LU decomposition: Division by Zero");
ojan 3:5358a691a100 235
ojan 3:5358a691a100 236 // d行d列目以降の行列について計算
ojan 3:5358a691a100 237 for (int i = d+1; i < row; i++) {
ojan 3:5358a691a100 238 retVal.components[i * col + d] /= c;
ojan 3:5358a691a100 239 for (int j = d+1; j < col; j++) {
ojan 3:5358a691a100 240 retVal.components[i * col + j] -= retVal.components[d * col + j] * retVal.components[i * col + d];
ojan 3:5358a691a100 241 }
ojan 3:5358a691a100 242 }
ojan 3:5358a691a100 243 }
ojan 3:5358a691a100 244
ojan 3:5358a691a100 245 retVal.CleanUp();
ojan 3:5358a691a100 246
ojan 3:5358a691a100 247 return retVal;
ojan 3:5358a691a100 248 }
ojan 3:5358a691a100 249
ojan 3:5358a691a100 250 float Matrix::Inverse(Matrix& invm) const{
ojan 23:79cdc1432160 251 if (row != col) error("failed to get Inv. : matrix is not square");
ojan 3:5358a691a100 252
ojan 3:5358a691a100 253 Matrix P(*this);
ojan 3:5358a691a100 254 Matrix LU(LU_Decompose(0, &P));
ojan 3:5358a691a100 255
ojan 3:5358a691a100 256 // 分解した行列の対角成分の積から行列式を求める
ojan 3:5358a691a100 257 // det = 0　ならfalse
ojan 3:5358a691a100 258 float det = 1.0f;
ojan 3:5358a691a100 259 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 260 det *= LU.components[i * col + i];
ojan 3:5358a691a100 261 }
ojan 3:5358a691a100 262 if (fabs(det) < NEARLY_ZERO) {
ojan 3:5358a691a100 263 return fabs(det);
ojan 3:5358a691a100 264 }
ojan 3:5358a691a100 265
ojan 3:5358a691a100 266 // U、Lそれぞれの逆行列を計算する
ojan 3:5358a691a100 267 Matrix U_inv = Matrix(row, col);
ojan 3:5358a691a100 268 Matrix L_inv = Matrix(row, col);
ojan 3:5358a691a100 269
ojan 3:5358a691a100 270 for (int j = 0; j < col; j++) {
ojan 3:5358a691a100 271 for (int i = 0; i <= j; i++) {
ojan 3:5358a691a100 272 int i_U = j - i; // U行列の逆行列は対角成分から上へ向かって
ojan 3:5358a691a100 273 // 左から順番に値を計算する
ojan 3:5358a691a100 274
ojan 3:5358a691a100 275 int j_L = col - 1 - j; // L行列の逆行列は右から順番に
ojan 3:5358a691a100 276 int i_L = j_L + i; // 対角成分から下へ向かって計算する
ojan 3:5358a691a100 277
ojan 3:5358a691a100 278 if (i_U != j) { // 非対角成分
ojan 3:5358a691a100 279 float temp_U = 0.0f;
ojan 3:5358a691a100 280 float temp_L = 0.0f;
ojan 3:5358a691a100 281
ojan 3:5358a691a100 282 for (int k = 0; k < i; k++) {
ojan 3:5358a691a100 283
ojan 3:5358a691a100 284 temp_U -= U_inv.components[(j - k) * col + j] * LU.components[i_U * col + (j - k)];
ojan 3:5358a691a100 285
ojan 3:5358a691a100 286 if (k == 0) {
ojan 3:5358a691a100 287 temp_L -= LU.components[i_L * col + j_L];
ojan 3:5358a691a100 288 } else {
ojan 3:5358a691a100 289 temp_L -= L_inv.components[(j_L + k) * col + j_L] * LU.components[i_L * col + j_L + k];
ojan 3:5358a691a100 290 }
ojan 3:5358a691a100 291
ojan 3:5358a691a100 292 }
ojan 3:5358a691a100 293
ojan 3:5358a691a100 294 U_inv.components[i_U * col + j] = temp_U / LU.components[i_U * col + i_U];
ojan 3:5358a691a100 295 L_inv.components[i_L * col + j_L] = temp_L;
ojan 3:5358a691a100 296
ojan 3:5358a691a100 297 } else { // 対角成分
ojan 3:5358a691a100 298 if (fabs(LU.components[i_U * col + i_U]) >= NEARLY_ZERO) {
ojan 3:5358a691a100 299 U_inv.components[i_U * col + i_U] = 1.0f / LU.components[i_U * col + i_U];
ojan 3:5358a691a100 300 }
ojan 3:5358a691a100 301 }
ojan 3:5358a691a100 302 }
ojan 3:5358a691a100 303 }
ojan 3:5358a691a100 304
ojan 3:5358a691a100 305 invm = U_inv * L_inv * P;
ojan 3:5358a691a100 306
ojan 3:5358a691a100 307 return -1.0f;
ojan 3:5358a691a100 308 }
ojan 3:5358a691a100 309
ojan 3:5358a691a100 310 Matrix Matrix::Transpose() const{
ojan 23:79cdc1432160 311 //if (row != col) error("failed to get Trans. : matrix is not square");
ojan 3:5358a691a100 312 Matrix retVal(col, row);
ojan 3:5358a691a100 313
ojan 3:5358a691a100 314 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 315 for (int j = 0; j < col; j++) {
ojan 3:5358a691a100 316 retVal.components[j * row + i] = this->components[i * col + j];
ojan 3:5358a691a100 317 }
ojan 3:5358a691a100 318 }
ojan 3:5358a691a100 319
ojan 3:5358a691a100 320 return retVal;
ojan 3:5358a691a100 321 }
ojan 3:5358a691a100 322
ojan 3:5358a691a100 323 Matrix operator+(const Matrix& lhm, const Matrix& rhm) {
ojan 3:5358a691a100 324 Matrix temp = Matrix(lhm);
ojan 3:5358a691a100 325 temp += rhm;
ojan 3:5358a691a100 326 return temp;
ojan 3:5358a691a100 327 }
ojan 3:5358a691a100 328
ojan 3:5358a691a100 329 Matrix operator-(const Matrix& lhm, const Matrix& rhm) {
ojan 3:5358a691a100 330 Matrix temp = Matrix(lhm);
ojan 3:5358a691a100 331 temp -= rhm;
ojan 3:5358a691a100 332 return temp;
ojan 3:5358a691a100 333 }
ojan 3:5358a691a100 334
ojan 3:5358a691a100 335 Matrix operator*(const Matrix& lhm, const Matrix& rhm) {
ojan 23:79cdc1432160 336 if(lhm.GetCol() != rhm.GetRow()) error("Matrix product Error: Irregular Dimention.");
ojan 3:5358a691a100 337 int row = lhm.GetRow();
ojan 3:5358a691a100 338 int col = rhm.GetCol();
ojan 3:5358a691a100 339 int sum = lhm.GetCol();
ojan 3:5358a691a100 340 Matrix temp(row, col);
ojan 3:5358a691a100 341
ojan 3:5358a691a100 342 for (int i = 1; i <= row; i++) {
ojan 3:5358a691a100 343 for (int j = 1; j <= col; j++) {
ojan 3:5358a691a100 344 float temp_c = 0.0f;
ojan 3:5358a691a100 345 for (int k = 1; k <= sum; k++) {
ojan 3:5358a691a100 346 temp_c += lhm.GetComp(i, k) * rhm.GetComp(k, j);
ojan 3:5358a691a100 347 }
ojan 3:5358a691a100 348 temp.SetComp(i, j, temp_c);
ojan 3:5358a691a100 349 }
ojan 3:5358a691a100 350 }
ojan 3:5358a691a100 351
ojan 3:5358a691a100 352 return temp;
ojan 3:5358a691a100 353 }
ojan 3:5358a691a100 354
ojan 3:5358a691a100 355 void Matrix::CleanUp() {
ojan 3:5358a691a100 356 int num = row*col;
ojan 3:5358a691a100 357 float maxComp = 0.0f;
ojan 3:5358a691a100 358 for (int i = 0; i < num; i++) {
ojan 3:5358a691a100 359 if (maxComp < fabs(components[i])) maxComp = fabs(components[i]);
ojan 3:5358a691a100 360 }
ojan 3:5358a691a100 361 if (maxComp > NEARLY_ZERO) {
ojan 3:5358a691a100 362 for (int i = 0; i < num; i++) {
ojan 3:5358a691a100 363 if (fabs(components[i]) / maxComp < ZERO_TOLERANCE) components[i] = 0.0f;
ojan 3:5358a691a100 364 }
ojan 3:5358a691a100 365 }
ojan 3:5358a691a100 366 }
ojan 3:5358a691a100 367
ojan 3:5358a691a100 368 void Matrix::SwapRow(int rowNo1, int rowNo2) {
ojan 23:79cdc1432160 369 if (rowNo1 > row || rowNo2 > row) error("Index Out of Bounds Error !!");
ojan 3:5358a691a100 370 float* temp = new float[col];
ojan 3:5358a691a100 371
ojan 3:5358a691a100 372 memcpy(temp, components + (rowNo1 - 1) * col, sizeof(float) * col);
ojan 3:5358a691a100 373 memcpy(components + (rowNo1 - 1) * col, components + (rowNo2 - 1) * col, sizeof(float) * col);
ojan 3:5358a691a100 374 memcpy(components + (rowNo2 - 1) * col, temp, sizeof(float) * col);
ojan 3:5358a691a100 375
ojan 3:5358a691a100 376 delete[] temp;
ojan 3:5358a691a100 377 }
ojan 3:5358a691a100 378
ojan 3:5358a691a100 379 void Matrix::SwapCol(int colNo1, int colNo2) {
ojan 23:79cdc1432160 380 if (colNo1 > col || colNo2 > col) error("Index Out of Bounds Error !!");
ojan 3:5358a691a100 381 float temp = 0.0f;
ojan 3:5358a691a100 382
ojan 3:5358a691a100 383 for (int i = 0; i < row; i++) {
ojan 3:5358a691a100 384 temp = components[i * col + colNo1];
ojan 3:5358a691a100 385 components[i * col + colNo1] = components[i * col + colNo2];
ojan 3:5358a691a100 386 components[i * col + colNo2] = temp;
ojan 3:5358a691a100 387 }
ojan 3:5358a691a100 388 }