Mercurial > hg > octave-lyh
annotate liboctave/dRowVector.cc @ 11518:141b3fb5cef7
style fixes
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 13 Jan 2011 16:52:30 -0500 |
| parents | a0728e81ed25 |
| children | fd0a3ac60b0e |
| rev | line source |
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| 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, | |
| 11518 | 45 const octave_idx_type&, const octave_idx_type&, |
| 46 const double&, const double*, | |
| 47 const octave_idx_type&, const double*, | |
| 48 const octave_idx_type&, const double&, | |
| 49 double*, const octave_idx_type& | |
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50 F77_CHAR_ARG_LEN_DECL); |
| 5983 | 51 F77_RET_T |
| 11518 | 52 F77_FUNC (xddot, XDDOT) (const octave_idx_type&, const double*, |
| 53 const octave_idx_type&, const double*, | |
| 54 const octave_idx_type&, double&); | |
| 458 | 55 } |
| 56 | |
| 1360 | 57 // Row Vector class. |
| 458 | 58 |
| 2386 | 59 bool |
| 458 | 60 RowVector::operator == (const RowVector& a) const |
| 61 { | |
| 5275 | 62 octave_idx_type len = length (); |
| 458 | 63 if (len != a.length ()) |
| 64 return 0; | |
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65 return mx_inline_equal (len, data (), a.data ()); |
| 458 | 66 } |
| 67 | |
| 2386 | 68 bool |
| 458 | 69 RowVector::operator != (const RowVector& a) const |
| 70 { | |
| 71 return !(*this == a); | |
| 72 } | |
| 73 | |
| 74 RowVector& | |
| 5275 | 75 RowVector::insert (const RowVector& a, octave_idx_type c) |
| 458 | 76 { |
| 5275 | 77 octave_idx_type a_len = a.length (); |
| 4316 | 78 |
| 1699 | 79 if (c < 0 || c + a_len > length ()) |
| 458 | 80 { |
| 81 (*current_liboctave_error_handler) ("range error for insert"); | |
| 82 return *this; | |
| 83 } | |
| 84 | |
| 4316 | 85 if (a_len > 0) |
| 86 { | |
| 87 make_unique (); | |
| 88 | |
| 5275 | 89 for (octave_idx_type i = 0; i < a_len; i++) |
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90 xelem (c+i) = a.elem (i); |
| 4316 | 91 } |
| 458 | 92 |
| 93 return *this; | |
| 94 } | |
| 95 | |
| 96 RowVector& | |
| 97 RowVector::fill (double val) | |
| 98 { | |
| 5275 | 99 octave_idx_type len = length (); |
| 4316 | 100 |
| 458 | 101 if (len > 0) |
| 4316 | 102 { |
| 103 make_unique (); | |
| 104 | |
| 5275 | 105 for (octave_idx_type i = 0; i < len; i++) |
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106 xelem (i) = val; |
| 4316 | 107 } |
| 108 | |
| 458 | 109 return *this; |
| 110 } | |
| 111 | |
| 112 RowVector& | |
| 5275 | 113 RowVector::fill (double val, octave_idx_type c1, octave_idx_type c2) |
| 458 | 114 { |
| 5275 | 115 octave_idx_type len = length (); |
| 4316 | 116 |
| 458 | 117 if (c1 < 0 || c2 < 0 || c1 >= len || c2 >= len) |
| 118 { | |
| 119 (*current_liboctave_error_handler) ("range error for fill"); | |
| 120 return *this; | |
| 121 } | |
| 122 | |
| 5275 | 123 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; } |
| 458 | 124 |
| 4316 | 125 if (c2 >= c1) |
| 126 { | |
| 127 make_unique (); | |
| 128 | |
| 5275 | 129 for (octave_idx_type i = c1; i <= c2; i++) |
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130 xelem (i) = val; |
| 4316 | 131 } |
| 458 | 132 |
| 133 return *this; | |
| 134 } | |
| 135 | |
| 136 RowVector | |
| 137 RowVector::append (const RowVector& a) const | |
| 138 { | |
| 5275 | 139 octave_idx_type len = length (); |
| 140 octave_idx_type nc_insert = len; | |
| 458 | 141 RowVector retval (len + a.length ()); |
| 142 retval.insert (*this, 0); | |
| 143 retval.insert (a, nc_insert); | |
| 144 return retval; | |
| 145 } | |
| 146 | |
| 147 ColumnVector | |
| 148 RowVector::transpose (void) const | |
| 149 { | |
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150 return MArray<double>::transpose(); |
| 458 | 151 } |
| 152 | |
| 153 RowVector | |
| 1205 | 154 real (const ComplexRowVector& a) |
| 155 { | |
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156 return do_mx_unary_op<double, Complex> (a, mx_inline_real); |
| 1205 | 157 } |
| 158 | |
| 159 RowVector | |
| 160 imag (const ComplexRowVector& a) | |
| 161 { | |
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162 return do_mx_unary_op<double, Complex> (a, mx_inline_imag); |
| 1205 | 163 } |
| 164 | |
| 165 RowVector | |
| 5275 | 166 RowVector::extract (octave_idx_type c1, octave_idx_type c2) const |
| 458 | 167 { |
| 5275 | 168 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; } |
| 458 | 169 |
| 5275 | 170 octave_idx_type new_c = c2 - c1 + 1; |
| 458 | 171 |
| 172 RowVector result (new_c); | |
| 173 | |
| 5275 | 174 for (octave_idx_type i = 0; i < new_c; i++) |
| 4316 | 175 result.xelem (i) = elem (c1+i); |
| 176 | |
| 177 return result; | |
| 178 } | |
| 179 | |
| 180 RowVector | |
| 5275 | 181 RowVector::extract_n (octave_idx_type r1, octave_idx_type n) const |
| 4316 | 182 { |
| 183 RowVector result (n); | |
| 184 | |
| 5275 | 185 for (octave_idx_type i = 0; i < n; i++) |
| 4316 | 186 result.xelem (i) = elem (r1+i); |
| 458 | 187 |
| 188 return result; | |
| 189 } | |
| 190 | |
| 191 // row vector by matrix -> row vector | |
| 192 | |
| 193 RowVector | |
| 194 operator * (const RowVector& v, const Matrix& a) | |
| 195 { | |
| 1947 | 196 RowVector retval; |
| 197 | |
| 5275 | 198 octave_idx_type len = v.length (); |
| 1947 | 199 |
| 5275 | 200 octave_idx_type a_nr = a.rows (); |
| 201 octave_idx_type a_nc = a.cols (); | |
| 2386 | 202 |
| 203 if (a_nr != len) | |
| 204 gripe_nonconformant ("operator *", 1, len, a_nr, a_nc); | |
| 1947 | 205 else |
| 458 | 206 { |
| 1947 | 207 if (len == 0) |
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208 retval.resize (a_nc, 0.0); |
| 1947 | 209 else |
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210 { |
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211 // Transpose A to form A'*x == (x'*A)' |
| 1947 | 212 |
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213 octave_idx_type ld = a_nr; |
| 1947 | 214 |
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215 retval.resize (a_nc); |
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216 double *y = retval.fortran_vec (); |
| 1947 | 217 |
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218 F77_XFCN (dgemv, DGEMV, (F77_CONST_CHAR_ARG2 ("T", 1), |
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219 a_nr, a_nc, 1.0, a.data (), |
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220 ld, v.data (), 1, 0.0, y, 1 |
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221 F77_CHAR_ARG_LEN (1))); |
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222 } |
| 458 | 223 } |
| 224 | |
| 1947 | 225 return retval; |
| 458 | 226 } |
| 227 | |
| 228 // other operations | |
| 229 | |
| 230 double | |
| 231 RowVector::min (void) const | |
| 232 { | |
| 5275 | 233 octave_idx_type len = length (); |
| 458 | 234 if (len == 0) |
| 235 return 0; | |
| 236 | |
| 237 double res = elem (0); | |
| 238 | |
| 5275 | 239 for (octave_idx_type i = 1; i < len; i++) |
| 458 | 240 if (elem (i) < res) |
| 241 res = elem (i); | |
| 242 | |
| 243 return res; | |
| 244 } | |
| 245 | |
| 246 double | |
| 247 RowVector::max (void) const | |
| 248 { | |
| 5275 | 249 octave_idx_type len = length (); |
| 458 | 250 if (len == 0) |
| 251 return 0; | |
| 252 | |
| 253 double res = elem (0); | |
| 254 | |
| 5275 | 255 for (octave_idx_type i = 1; i < len; i++) |
| 458 | 256 if (elem (i) > res) |
| 257 res = elem (i); | |
| 258 | |
| 259 return res; | |
| 260 } | |
| 261 | |
| 3504 | 262 std::ostream& |
| 263 operator << (std::ostream& os, const RowVector& a) | |
| 458 | 264 { |
| 265 // int field_width = os.precision () + 7; | |
| 1360 | 266 |
| 5275 | 267 for (octave_idx_type i = 0; i < a.length (); i++) |
| 458 | 268 os << " " /* setw (field_width) */ << a.elem (i); |
| 269 return os; | |
| 270 } | |
| 271 | |
| 3504 | 272 std::istream& |
| 273 operator >> (std::istream& is, RowVector& a) | |
| 458 | 274 { |
| 5275 | 275 octave_idx_type len = a.length(); |
| 458 | 276 |
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277 if (len > 0) |
| 458 | 278 { |
| 279 double tmp; | |
| 5275 | 280 for (octave_idx_type i = 0; i < len; i++) |
| 458 | 281 { |
| 282 is >> tmp; | |
| 283 if (is) | |
| 284 a.elem (i) = tmp; | |
| 285 else | |
| 286 break; | |
| 287 } | |
| 288 } | |
| 532 | 289 return is; |
| 458 | 290 } |
| 291 | |
| 1205 | 292 // other operations |
| 293 | |
| 294 RowVector | |
| 5275 | 295 linspace (double x1, double x2, octave_idx_type n) |
| 1205 | 296 { |
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297 if (n < 1) n = 1; |
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298 |
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299 NoAlias<RowVector> retval (n); |
| 1205 | 300 |
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301 double delta = (x2 - x1) / (n - 1); |
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302 retval(0) = x1; |
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303 for (octave_idx_type i = 1; i < n-1; i++) |
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304 retval(i) = x1 + i*delta; |
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305 retval(n-1) = x2; |
| 1205 | 306 |
| 307 return retval; | |
| 308 } | |
| 309 | |
| 310 // row vector by column vector -> scalar | |
| 311 | |
| 312 double | |
| 313 operator * (const RowVector& v, const ColumnVector& a) | |
| 314 { | |
| 1947 | 315 double retval = 0.0; |
| 316 | |
| 5275 | 317 octave_idx_type len = v.length (); |
| 1947 | 318 |
| 5275 | 319 octave_idx_type a_len = a.length (); |
| 2386 | 320 |
| 321 if (len != a_len) | |
| 322 gripe_nonconformant ("operator *", len, a_len); | |
| 1947 | 323 else if (len != 0) |
| 5983 | 324 F77_FUNC (xddot, XDDOT) (len, v.data (), 1, a.data (), 1, retval); |
| 1205 | 325 |
| 1947 | 326 return retval; |
| 1205 | 327 } |
| 328 | |
| 329 Complex | |
| 330 operator * (const RowVector& v, const ComplexColumnVector& a) | |
| 331 { | |
| 332 ComplexRowVector tmp (v); | |
| 333 return tmp * a; | |
| 334 } |