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annotate liboctave/dRowVector.cc @ 8920:eb63fbe60fab
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| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Sat, 07 Mar 2009 10:41:27 -0500 |
| parents | 82be108cc558 |
| children | dc07bc4157b8 |
| rev | line source |
|---|---|
| 1993 | 1 // RowVector manipulations. |
| 458 | 2 /* |
| 3 | |
| 7017 | 4 Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, |
| 8920 | 5 2004, 2005, 2006, 2007, 2008 John W. Eaton |
| 458 | 6 |
| 7 This file is part of Octave. | |
| 8 | |
| 9 Octave is free software; you can redistribute it and/or modify it | |
| 10 under the terms of the GNU General Public License as published by the | |
| 7016 | 11 Free Software Foundation; either version 3 of the License, or (at your |
| 12 option) any later version. | |
| 458 | 13 |
| 14 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 17 for more details. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License | |
| 7016 | 20 along with Octave; see the file COPYING. If not, see |
| 21 <http://www.gnu.org/licenses/>. | |
| 458 | 22 |
| 23 */ | |
| 24 | |
| 25 #ifdef HAVE_CONFIG_H | |
| 1192 | 26 #include <config.h> |
| 458 | 27 #endif |
| 28 | |
| 3503 | 29 #include <iostream> |
| 458 | 30 |
| 4669 | 31 #include "Array-util.h" |
| 1847 | 32 #include "f77-fcn.h" |
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33 #include "functor.h" |
| 1368 | 34 #include "lo-error.h" |
| 458 | 35 #include "mx-base.h" |
| 36 #include "mx-inlines.cc" | |
| 1650 | 37 #include "oct-cmplx.h" |
| 458 | 38 |
| 39 // Fortran functions we call. | |
| 40 | |
| 41 extern "C" | |
| 42 { | |
| 4552 | 43 F77_RET_T |
| 44 F77_FUNC (dgemv, DGEMV) (F77_CONST_CHAR_ARG_DECL, | |
| 5275 | 45 const octave_idx_type&, const octave_idx_type&, const double&, |
| 46 const double*, const octave_idx_type&, const double*, | |
| 47 const octave_idx_type&, const double&, double*, const octave_idx_type& | |
| 4552 | 48 F77_CHAR_ARG_LEN_DECL); |
| 5983 | 49 F77_RET_T |
| 50 F77_FUNC (xddot, XDDOT) (const octave_idx_type&, const double*, const octave_idx_type&, | |
| 51 const double*, const octave_idx_type&, double&); | |
| 458 | 52 } |
| 53 | |
| 1360 | 54 // Row Vector class. |
| 458 | 55 |
| 2386 | 56 bool |
| 458 | 57 RowVector::operator == (const RowVector& a) const |
| 58 { | |
| 5275 | 59 octave_idx_type len = length (); |
| 458 | 60 if (len != a.length ()) |
| 61 return 0; | |
| 3769 | 62 return mx_inline_equal (data (), a.data (), len); |
| 458 | 63 } |
| 64 | |
| 2386 | 65 bool |
| 458 | 66 RowVector::operator != (const RowVector& a) const |
| 67 { | |
| 68 return !(*this == a); | |
| 69 } | |
| 70 | |
| 71 RowVector& | |
| 5275 | 72 RowVector::insert (const RowVector& a, octave_idx_type c) |
| 458 | 73 { |
| 5275 | 74 octave_idx_type a_len = a.length (); |
| 4316 | 75 |
| 1699 | 76 if (c < 0 || c + a_len > length ()) |
| 458 | 77 { |
| 78 (*current_liboctave_error_handler) ("range error for insert"); | |
| 79 return *this; | |
| 80 } | |
| 81 | |
| 4316 | 82 if (a_len > 0) |
| 83 { | |
| 84 make_unique (); | |
| 85 | |
| 5275 | 86 for (octave_idx_type i = 0; i < a_len; i++) |
| 4316 | 87 xelem (c+i) = a.elem (i); |
| 88 } | |
| 458 | 89 |
| 90 return *this; | |
| 91 } | |
| 92 | |
| 93 RowVector& | |
| 94 RowVector::fill (double val) | |
| 95 { | |
| 5275 | 96 octave_idx_type len = length (); |
| 4316 | 97 |
| 458 | 98 if (len > 0) |
| 4316 | 99 { |
| 100 make_unique (); | |
| 101 | |
| 5275 | 102 for (octave_idx_type i = 0; i < len; i++) |
| 4316 | 103 xelem (i) = val; |
| 104 } | |
| 105 | |
| 458 | 106 return *this; |
| 107 } | |
| 108 | |
| 109 RowVector& | |
| 5275 | 110 RowVector::fill (double val, octave_idx_type c1, octave_idx_type c2) |
| 458 | 111 { |
| 5275 | 112 octave_idx_type len = length (); |
| 4316 | 113 |
| 458 | 114 if (c1 < 0 || c2 < 0 || c1 >= len || c2 >= len) |
| 115 { | |
| 116 (*current_liboctave_error_handler) ("range error for fill"); | |
| 117 return *this; | |
| 118 } | |
| 119 | |
| 5275 | 120 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; } |
| 458 | 121 |
| 4316 | 122 if (c2 >= c1) |
| 123 { | |
| 124 make_unique (); | |
| 125 | |
| 5275 | 126 for (octave_idx_type i = c1; i <= c2; i++) |
| 4316 | 127 xelem (i) = val; |
| 128 } | |
| 458 | 129 |
| 130 return *this; | |
| 131 } | |
| 132 | |
| 133 RowVector | |
| 134 RowVector::append (const RowVector& a) const | |
| 135 { | |
| 5275 | 136 octave_idx_type len = length (); |
| 137 octave_idx_type nc_insert = len; | |
| 458 | 138 RowVector retval (len + a.length ()); |
| 139 retval.insert (*this, 0); | |
| 140 retval.insert (a, nc_insert); | |
| 141 return retval; | |
| 142 } | |
| 143 | |
| 144 ColumnVector | |
| 145 RowVector::transpose (void) const | |
| 146 { | |
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147 return MArray<double>::transpose(); |
| 458 | 148 } |
| 149 | |
| 150 RowVector | |
| 1205 | 151 real (const ComplexRowVector& a) |
| 152 { | |
| 5275 | 153 octave_idx_type a_len = a.length (); |
| 1205 | 154 RowVector retval; |
| 155 if (a_len > 0) | |
| 3769 | 156 retval = RowVector (mx_inline_real_dup (a.data (), a_len), a_len); |
| 1205 | 157 return retval; |
| 158 } | |
| 159 | |
| 160 RowVector | |
| 161 imag (const ComplexRowVector& a) | |
| 162 { | |
| 5275 | 163 octave_idx_type a_len = a.length (); |
| 1205 | 164 RowVector retval; |
| 165 if (a_len > 0) | |
| 3769 | 166 retval = RowVector (mx_inline_imag_dup (a.data (), a_len), a_len); |
| 1205 | 167 return retval; |
| 168 } | |
| 169 | |
| 170 RowVector | |
| 5275 | 171 RowVector::extract (octave_idx_type c1, octave_idx_type c2) const |
| 458 | 172 { |
| 5275 | 173 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; } |
| 458 | 174 |
| 5275 | 175 octave_idx_type new_c = c2 - c1 + 1; |
| 458 | 176 |
| 177 RowVector result (new_c); | |
| 178 | |
| 5275 | 179 for (octave_idx_type i = 0; i < new_c; i++) |
| 4316 | 180 result.xelem (i) = elem (c1+i); |
| 181 | |
| 182 return result; | |
| 183 } | |
| 184 | |
| 185 RowVector | |
| 5275 | 186 RowVector::extract_n (octave_idx_type r1, octave_idx_type n) const |
| 4316 | 187 { |
| 188 RowVector result (n); | |
| 189 | |
| 5275 | 190 for (octave_idx_type i = 0; i < n; i++) |
| 4316 | 191 result.xelem (i) = elem (r1+i); |
| 458 | 192 |
| 193 return result; | |
| 194 } | |
| 195 | |
| 196 // row vector by matrix -> row vector | |
| 197 | |
| 198 RowVector | |
| 199 operator * (const RowVector& v, const Matrix& a) | |
| 200 { | |
| 1947 | 201 RowVector retval; |
| 202 | |
| 5275 | 203 octave_idx_type len = v.length (); |
| 1947 | 204 |
| 5275 | 205 octave_idx_type a_nr = a.rows (); |
| 206 octave_idx_type a_nc = a.cols (); | |
| 2386 | 207 |
| 208 if (a_nr != len) | |
| 209 gripe_nonconformant ("operator *", 1, len, a_nr, a_nc); | |
| 1947 | 210 else |
| 458 | 211 { |
| 1947 | 212 if (len == 0) |
| 213 retval.resize (a_nc, 0.0); | |
| 214 else | |
| 215 { | |
| 216 // Transpose A to form A'*x == (x'*A)' | |
| 217 | |
| 5275 | 218 octave_idx_type ld = a_nr; |
| 1947 | 219 |
| 220 retval.resize (a_nc); | |
| 221 double *y = retval.fortran_vec (); | |
| 222 | |
| 4552 | 223 F77_XFCN (dgemv, DGEMV, (F77_CONST_CHAR_ARG2 ("T", 1), |
| 224 a_nr, a_nc, 1.0, a.data (), | |
| 225 ld, v.data (), 1, 0.0, y, 1 | |
| 226 F77_CHAR_ARG_LEN (1))); | |
| 1947 | 227 } |
| 458 | 228 } |
| 229 | |
| 1947 | 230 return retval; |
| 458 | 231 } |
| 232 | |
| 233 // other operations | |
| 234 | |
| 235 RowVector | |
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236 RowVector::map (dmapper fcn) const |
| 458 | 237 { |
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238 return MArray<double>::map<double> (func_ptr (fcn)); |
| 458 | 239 } |
| 240 | |
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241 ComplexRowVector |
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242 RowVector::map (cmapper fcn) const |
| 1205 | 243 { |
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244 return MArray<double>::map<Complex> (func_ptr (fcn)); |
| 458 | 245 } |
| 246 | |
| 247 double | |
| 248 RowVector::min (void) const | |
| 249 { | |
| 5275 | 250 octave_idx_type len = length (); |
| 458 | 251 if (len == 0) |
| 252 return 0; | |
| 253 | |
| 254 double res = elem (0); | |
| 255 | |
| 5275 | 256 for (octave_idx_type i = 1; i < len; i++) |
| 458 | 257 if (elem (i) < res) |
| 258 res = elem (i); | |
| 259 | |
| 260 return res; | |
| 261 } | |
| 262 | |
| 263 double | |
| 264 RowVector::max (void) const | |
| 265 { | |
| 5275 | 266 octave_idx_type len = length (); |
| 458 | 267 if (len == 0) |
| 268 return 0; | |
| 269 | |
| 270 double res = elem (0); | |
| 271 | |
| 5275 | 272 for (octave_idx_type i = 1; i < len; i++) |
| 458 | 273 if (elem (i) > res) |
| 274 res = elem (i); | |
| 275 | |
| 276 return res; | |
| 277 } | |
| 278 | |
| 3504 | 279 std::ostream& |
| 280 operator << (std::ostream& os, const RowVector& a) | |
| 458 | 281 { |
| 282 // int field_width = os.precision () + 7; | |
| 1360 | 283 |
| 5275 | 284 for (octave_idx_type i = 0; i < a.length (); i++) |
| 458 | 285 os << " " /* setw (field_width) */ << a.elem (i); |
| 286 return os; | |
| 287 } | |
| 288 | |
| 3504 | 289 std::istream& |
| 290 operator >> (std::istream& is, RowVector& a) | |
| 458 | 291 { |
| 5275 | 292 octave_idx_type len = a.length(); |
| 458 | 293 |
| 294 if (len < 1) | |
| 3504 | 295 is.clear (std::ios::badbit); |
| 458 | 296 else |
| 297 { | |
| 298 double tmp; | |
| 5275 | 299 for (octave_idx_type i = 0; i < len; i++) |
| 458 | 300 { |
| 301 is >> tmp; | |
| 302 if (is) | |
| 303 a.elem (i) = tmp; | |
| 304 else | |
| 305 break; | |
| 306 } | |
| 307 } | |
| 532 | 308 return is; |
| 458 | 309 } |
| 310 | |
| 1205 | 311 // other operations |
| 312 | |
| 313 RowVector | |
| 5275 | 314 linspace (double x1, double x2, octave_idx_type n) |
| 1205 | 315 { |
| 316 RowVector retval; | |
| 317 | |
| 3322 | 318 if (n > 1) |
| 1205 | 319 { |
| 320 retval.resize (n); | |
| 321 double delta = (x2 - x1) / (n - 1); | |
| 322 retval.elem (0) = x1; | |
| 5275 | 323 for (octave_idx_type i = 1; i < n-1; i++) |
| 1205 | 324 retval.elem (i) = x1 + i * delta; |
| 325 retval.elem (n-1) = x2; | |
| 326 } | |
| 6630 | 327 else |
| 3322 | 328 { |
| 6629 | 329 retval.resize (1); |
| 330 retval.elem (0) = x2; | |
| 3322 | 331 } |
| 1205 | 332 |
| 333 return retval; | |
| 334 } | |
| 335 | |
| 336 // row vector by column vector -> scalar | |
| 337 | |
| 338 double | |
| 339 operator * (const RowVector& v, const ColumnVector& a) | |
| 340 { | |
| 1947 | 341 double retval = 0.0; |
| 342 | |
| 5275 | 343 octave_idx_type len = v.length (); |
| 1947 | 344 |
| 5275 | 345 octave_idx_type a_len = a.length (); |
| 2386 | 346 |
| 347 if (len != a_len) | |
| 348 gripe_nonconformant ("operator *", len, a_len); | |
| 1947 | 349 else if (len != 0) |
| 5983 | 350 F77_FUNC (xddot, XDDOT) (len, v.data (), 1, a.data (), 1, retval); |
| 1205 | 351 |
| 1947 | 352 return retval; |
| 1205 | 353 } |
| 354 | |
| 355 Complex | |
| 356 operator * (const RowVector& v, const ComplexColumnVector& a) | |
| 357 { | |
| 358 ComplexRowVector tmp (v); | |
| 359 return tmp * a; | |
| 360 } | |
| 361 | |
| 458 | 362 /* |
| 363 ;;; Local Variables: *** | |
| 364 ;;; mode: C++ *** | |
| 365 ;;; End: *** | |
| 366 */ |