Mercurial > hg > octave-lyh
annotate liboctave/dRowVector.cc @ 10363:a0728e81ed25
improve diag matrix interface & implementation
| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Fri, 26 Feb 2010 11:44:38 +0100 |
| parents | 07ebe522dac2 |
| children | 141b3fb5cef7 |
| 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, | |
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45 const octave_idx_type&, const octave_idx_type&, const double&, |
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46 const double*, const octave_idx_type&, const double*, |
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47 const octave_idx_type&, const double&, double*, const octave_idx_type& |
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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&, | |
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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; | |
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62 return mx_inline_equal (len, data (), a.data ()); |
| 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++) |
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87 xelem (c+i) = a.elem (i); |
| 4316 | 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++) |
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103 xelem (i) = val; |
| 4316 | 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++) |
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127 xelem (i) = val; |
| 4316 | 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 { | |
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153 return do_mx_unary_op<double, Complex> (a, mx_inline_real); |
| 1205 | 154 } |
| 155 | |
| 156 RowVector | |
| 157 imag (const ComplexRowVector& a) | |
| 158 { | |
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159 return do_mx_unary_op<double, Complex> (a, mx_inline_imag); |
| 1205 | 160 } |
| 161 | |
| 162 RowVector | |
| 5275 | 163 RowVector::extract (octave_idx_type c1, octave_idx_type c2) const |
| 458 | 164 { |
| 5275 | 165 if (c1 > c2) { octave_idx_type tmp = c1; c1 = c2; c2 = tmp; } |
| 458 | 166 |
| 5275 | 167 octave_idx_type new_c = c2 - c1 + 1; |
| 458 | 168 |
| 169 RowVector result (new_c); | |
| 170 | |
| 5275 | 171 for (octave_idx_type i = 0; i < new_c; i++) |
| 4316 | 172 result.xelem (i) = elem (c1+i); |
| 173 | |
| 174 return result; | |
| 175 } | |
| 176 | |
| 177 RowVector | |
| 5275 | 178 RowVector::extract_n (octave_idx_type r1, octave_idx_type n) const |
| 4316 | 179 { |
| 180 RowVector result (n); | |
| 181 | |
| 5275 | 182 for (octave_idx_type i = 0; i < n; i++) |
| 4316 | 183 result.xelem (i) = elem (r1+i); |
| 458 | 184 |
| 185 return result; | |
| 186 } | |
| 187 | |
| 188 // row vector by matrix -> row vector | |
| 189 | |
| 190 RowVector | |
| 191 operator * (const RowVector& v, const Matrix& a) | |
| 192 { | |
| 1947 | 193 RowVector retval; |
| 194 | |
| 5275 | 195 octave_idx_type len = v.length (); |
| 1947 | 196 |
| 5275 | 197 octave_idx_type a_nr = a.rows (); |
| 198 octave_idx_type a_nc = a.cols (); | |
| 2386 | 199 |
| 200 if (a_nr != len) | |
| 201 gripe_nonconformant ("operator *", 1, len, a_nr, a_nc); | |
| 1947 | 202 else |
| 458 | 203 { |
| 1947 | 204 if (len == 0) |
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205 retval.resize (a_nc, 0.0); |
| 1947 | 206 else |
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207 { |
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208 // Transpose A to form A'*x == (x'*A)' |
| 1947 | 209 |
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210 octave_idx_type ld = a_nr; |
| 1947 | 211 |
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212 retval.resize (a_nc); |
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213 double *y = retval.fortran_vec (); |
| 1947 | 214 |
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215 F77_XFCN (dgemv, DGEMV, (F77_CONST_CHAR_ARG2 ("T", 1), |
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216 a_nr, a_nc, 1.0, a.data (), |
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217 ld, v.data (), 1, 0.0, y, 1 |
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218 F77_CHAR_ARG_LEN (1))); |
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219 } |
| 458 | 220 } |
| 221 | |
| 1947 | 222 return retval; |
| 458 | 223 } |
| 224 | |
| 225 // other operations | |
| 226 | |
| 227 double | |
| 228 RowVector::min (void) const | |
| 229 { | |
| 5275 | 230 octave_idx_type len = length (); |
| 458 | 231 if (len == 0) |
| 232 return 0; | |
| 233 | |
| 234 double res = elem (0); | |
| 235 | |
| 5275 | 236 for (octave_idx_type i = 1; i < len; i++) |
| 458 | 237 if (elem (i) < res) |
| 238 res = elem (i); | |
| 239 | |
| 240 return res; | |
| 241 } | |
| 242 | |
| 243 double | |
| 244 RowVector::max (void) const | |
| 245 { | |
| 5275 | 246 octave_idx_type len = length (); |
| 458 | 247 if (len == 0) |
| 248 return 0; | |
| 249 | |
| 250 double res = elem (0); | |
| 251 | |
| 5275 | 252 for (octave_idx_type i = 1; i < len; i++) |
| 458 | 253 if (elem (i) > res) |
| 254 res = elem (i); | |
| 255 | |
| 256 return res; | |
| 257 } | |
| 258 | |
| 3504 | 259 std::ostream& |
| 260 operator << (std::ostream& os, const RowVector& a) | |
| 458 | 261 { |
| 262 // int field_width = os.precision () + 7; | |
| 1360 | 263 |
| 5275 | 264 for (octave_idx_type i = 0; i < a.length (); i++) |
| 458 | 265 os << " " /* setw (field_width) */ << a.elem (i); |
| 266 return os; | |
| 267 } | |
| 268 | |
| 3504 | 269 std::istream& |
| 270 operator >> (std::istream& is, RowVector& a) | |
| 458 | 271 { |
| 5275 | 272 octave_idx_type len = a.length(); |
| 458 | 273 |
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274 if (len > 0) |
| 458 | 275 { |
| 276 double tmp; | |
| 5275 | 277 for (octave_idx_type i = 0; i < len; i++) |
| 458 | 278 { |
| 279 is >> tmp; | |
| 280 if (is) | |
| 281 a.elem (i) = tmp; | |
| 282 else | |
| 283 break; | |
| 284 } | |
| 285 } | |
| 532 | 286 return is; |
| 458 | 287 } |
| 288 | |
| 1205 | 289 // other operations |
| 290 | |
| 291 RowVector | |
| 5275 | 292 linspace (double x1, double x2, octave_idx_type n) |
| 1205 | 293 { |
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294 if (n < 1) n = 1; |
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295 |
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296 NoAlias<RowVector> retval (n); |
| 1205 | 297 |
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298 double delta = (x2 - x1) / (n - 1); |
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299 retval(0) = x1; |
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300 for (octave_idx_type i = 1; i < n-1; i++) |
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301 retval(i) = x1 + i*delta; |
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302 retval(n-1) = x2; |
| 1205 | 303 |
| 304 return retval; | |
| 305 } | |
| 306 | |
| 307 // row vector by column vector -> scalar | |
| 308 | |
| 309 double | |
| 310 operator * (const RowVector& v, const ColumnVector& a) | |
| 311 { | |
| 1947 | 312 double retval = 0.0; |
| 313 | |
| 5275 | 314 octave_idx_type len = v.length (); |
| 1947 | 315 |
| 5275 | 316 octave_idx_type a_len = a.length (); |
| 2386 | 317 |
| 318 if (len != a_len) | |
| 319 gripe_nonconformant ("operator *", len, a_len); | |
| 1947 | 320 else if (len != 0) |
| 5983 | 321 F77_FUNC (xddot, XDDOT) (len, v.data (), 1, a.data (), 1, retval); |
| 1205 | 322 |
| 1947 | 323 return retval; |
| 1205 | 324 } |
| 325 | |
| 326 Complex | |
| 327 operator * (const RowVector& v, const ComplexColumnVector& a) | |
| 328 { | |
| 329 ComplexRowVector tmp (v); | |
| 330 return tmp * a; | |
| 331 } |