|
1993
|
1 // RowVector manipulations. |
|
458
|
2 /* |
|
|
3 |
|
2847
|
4 Copyright (C) 1996, 1997 John W. Eaton |
|
458
|
5 |
|
|
6 This file is part of Octave. |
|
|
7 |
|
|
8 Octave is free software; you can redistribute it and/or modify it |
|
|
9 under the terms of the GNU General Public License as published by the |
|
|
10 Free Software Foundation; either version 2, or (at your option) any |
|
|
11 later version. |
|
|
12 |
|
|
13 Octave is distributed in the hope that it will be useful, but WITHOUT |
|
|
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
|
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
|
16 for more details. |
|
|
17 |
|
|
18 You should have received a copy of the GNU General Public License |
|
|
19 along with Octave; see the file COPYING. If not, write to the Free |
|
1315
|
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
|
458
|
21 |
|
|
22 */ |
|
|
23 |
|
4192
|
24 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
|
1296
|
25 #pragma implementation |
|
|
26 #endif |
|
|
27 |
|
458
|
28 #ifdef HAVE_CONFIG_H |
|
1192
|
29 #include <config.h> |
|
458
|
30 #endif |
|
|
31 |
|
3503
|
32 #include <iostream> |
|
458
|
33 |
|
1847
|
34 #include "f77-fcn.h" |
|
1368
|
35 #include "lo-error.h" |
|
458
|
36 #include "mx-base.h" |
|
|
37 #include "mx-inlines.cc" |
|
1650
|
38 #include "oct-cmplx.h" |
|
458
|
39 |
|
|
40 // Fortran functions we call. |
|
|
41 |
|
|
42 extern "C" |
|
|
43 { |
|
3887
|
44 int F77_FUNC (dgemv, DGEMV) (const char*, const int&, const int&, |
|
1253
|
45 const double&, const double*, |
|
|
46 const int&, const double*, const int&, |
|
|
47 const double&, double*, const int&, |
|
|
48 long); |
|
458
|
49 |
|
3887
|
50 double F77_FUNC (ddot, DDOT) (const int&, const double*, const int&, |
|
1253
|
51 const double*, const int&); |
|
458
|
52 } |
|
|
53 |
|
1360
|
54 // Row Vector class. |
|
458
|
55 |
|
2386
|
56 bool |
|
458
|
57 RowVector::operator == (const RowVector& a) const |
|
|
58 { |
|
|
59 int len = length (); |
|
|
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& |
|
|
72 RowVector::insert (const RowVector& a, int c) |
|
|
73 { |
|
|
74 int 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 |
|
|
86 for (int i = 0; i < a_len; i++) |
|
|
87 xelem (c+i) = a.elem (i); |
|
|
88 } |
|
458
|
89 |
|
|
90 return *this; |
|
|
91 } |
|
|
92 |
|
|
93 RowVector& |
|
|
94 RowVector::fill (double val) |
|
|
95 { |
|
|
96 int len = length (); |
|
4316
|
97 |
|
458
|
98 if (len > 0) |
|
4316
|
99 { |
|
|
100 make_unique (); |
|
|
101 |
|
|
102 for (int i = 0; i < len; i++) |
|
|
103 xelem (i) = val; |
|
|
104 } |
|
|
105 |
|
458
|
106 return *this; |
|
|
107 } |
|
|
108 |
|
|
109 RowVector& |
|
|
110 RowVector::fill (double val, int c1, int c2) |
|
|
111 { |
|
|
112 int 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 |
|
|
120 if (c1 > c2) { int tmp = c1; c1 = c2; c2 = tmp; } |
|
|
121 |
|
4316
|
122 if (c2 >= c1) |
|
|
123 { |
|
|
124 make_unique (); |
|
|
125 |
|
|
126 for (int i = c1; i <= c2; i++) |
|
|
127 xelem (i) = val; |
|
|
128 } |
|
458
|
129 |
|
|
130 return *this; |
|
|
131 } |
|
|
132 |
|
|
133 RowVector |
|
|
134 RowVector::append (const RowVector& a) const |
|
|
135 { |
|
|
136 int len = length (); |
|
|
137 int nc_insert = len; |
|
|
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 { |
|
1858
|
147 return ColumnVector (*this); |
|
458
|
148 } |
|
|
149 |
|
|
150 RowVector |
|
1205
|
151 real (const ComplexRowVector& a) |
|
|
152 { |
|
|
153 int a_len = a.length (); |
|
|
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 { |
|
|
163 int a_len = a.length (); |
|
|
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 |
|
458
|
171 RowVector::extract (int c1, int c2) const |
|
|
172 { |
|
|
173 if (c1 > c2) { int tmp = c1; c1 = c2; c2 = tmp; } |
|
|
174 |
|
|
175 int new_c = c2 - c1 + 1; |
|
|
176 |
|
|
177 RowVector result (new_c); |
|
|
178 |
|
|
179 for (int i = 0; i < new_c; i++) |
|
4316
|
180 result.xelem (i) = elem (c1+i); |
|
|
181 |
|
|
182 return result; |
|
|
183 } |
|
|
184 |
|
|
185 RowVector |
|
|
186 RowVector::extract_n (int r1, int n) const |
|
|
187 { |
|
|
188 RowVector result (n); |
|
|
189 |
|
|
190 for (int i = 0; i < n; i++) |
|
|
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 |
|
458
|
203 int len = v.length (); |
|
1947
|
204 |
|
2386
|
205 int a_nr = a.rows (); |
|
|
206 int a_nc = a.cols (); |
|
|
207 |
|
|
208 if (a_nr != len) |
|
|
209 gripe_nonconformant ("operator *", 1, len, a_nr, a_nc); |
|
1947
|
210 else |
|
458
|
211 { |
|
1947
|
212 int a_nr = a.rows (); |
|
|
213 int a_nc = a.cols (); |
|
|
214 |
|
|
215 if (len == 0) |
|
|
216 retval.resize (a_nc, 0.0); |
|
|
217 else |
|
|
218 { |
|
|
219 // Transpose A to form A'*x == (x'*A)' |
|
|
220 |
|
|
221 int ld = a_nr; |
|
|
222 |
|
|
223 retval.resize (a_nc); |
|
|
224 double *y = retval.fortran_vec (); |
|
|
225 |
|
|
226 F77_XFCN (dgemv, DGEMV, ("T", a_nr, a_nc, 1.0, a.data (), |
|
|
227 ld, v.data (), 1, 0.0, y, 1, 1L)); |
|
|
228 |
|
|
229 if (f77_exception_encountered) |
|
|
230 (*current_liboctave_error_handler) |
|
|
231 ("unrecoverable error in dgemv"); |
|
|
232 } |
|
458
|
233 } |
|
|
234 |
|
1947
|
235 return retval; |
|
458
|
236 } |
|
|
237 |
|
|
238 // other operations |
|
|
239 |
|
|
240 RowVector |
|
2676
|
241 RowVector::map (d_d_Mapper f) const |
|
458
|
242 { |
|
2676
|
243 RowVector b (*this); |
|
|
244 return b.apply (f); |
|
458
|
245 } |
|
|
246 |
|
2676
|
247 RowVector& |
|
|
248 RowVector::apply (d_d_Mapper f) |
|
1205
|
249 { |
|
2676
|
250 double *d = fortran_vec (); // Ensures only one reference to my privates! |
|
1205
|
251 |
|
458
|
252 for (int i = 0; i < length (); i++) |
|
2676
|
253 d[i] = f (d[i]); |
|
|
254 |
|
|
255 return *this; |
|
458
|
256 } |
|
|
257 |
|
|
258 double |
|
|
259 RowVector::min (void) const |
|
|
260 { |
|
|
261 int len = length (); |
|
|
262 if (len == 0) |
|
|
263 return 0; |
|
|
264 |
|
|
265 double res = elem (0); |
|
|
266 |
|
|
267 for (int i = 1; i < len; i++) |
|
|
268 if (elem (i) < res) |
|
|
269 res = elem (i); |
|
|
270 |
|
|
271 return res; |
|
|
272 } |
|
|
273 |
|
|
274 double |
|
|
275 RowVector::max (void) const |
|
|
276 { |
|
|
277 int len = length (); |
|
|
278 if (len == 0) |
|
|
279 return 0; |
|
|
280 |
|
|
281 double res = elem (0); |
|
|
282 |
|
|
283 for (int i = 1; i < len; i++) |
|
|
284 if (elem (i) > res) |
|
|
285 res = elem (i); |
|
|
286 |
|
|
287 return res; |
|
|
288 } |
|
|
289 |
|
3504
|
290 std::ostream& |
|
|
291 operator << (std::ostream& os, const RowVector& a) |
|
458
|
292 { |
|
|
293 // int field_width = os.precision () + 7; |
|
1360
|
294 |
|
458
|
295 for (int i = 0; i < a.length (); i++) |
|
|
296 os << " " /* setw (field_width) */ << a.elem (i); |
|
|
297 return os; |
|
|
298 } |
|
|
299 |
|
3504
|
300 std::istream& |
|
|
301 operator >> (std::istream& is, RowVector& a) |
|
458
|
302 { |
|
|
303 int len = a.length(); |
|
|
304 |
|
|
305 if (len < 1) |
|
3504
|
306 is.clear (std::ios::badbit); |
|
458
|
307 else |
|
|
308 { |
|
|
309 double tmp; |
|
|
310 for (int i = 0; i < len; i++) |
|
|
311 { |
|
|
312 is >> tmp; |
|
|
313 if (is) |
|
|
314 a.elem (i) = tmp; |
|
|
315 else |
|
|
316 break; |
|
|
317 } |
|
|
318 } |
|
532
|
319 return is; |
|
458
|
320 } |
|
|
321 |
|
1205
|
322 // other operations |
|
|
323 |
|
|
324 RowVector |
|
|
325 linspace (double x1, double x2, int n) |
|
|
326 { |
|
|
327 RowVector retval; |
|
|
328 |
|
3322
|
329 if (n > 1) |
|
1205
|
330 { |
|
|
331 retval.resize (n); |
|
|
332 double delta = (x2 - x1) / (n - 1); |
|
|
333 retval.elem (0) = x1; |
|
|
334 for (int i = 1; i < n-1; i++) |
|
|
335 retval.elem (i) = x1 + i * delta; |
|
|
336 retval.elem (n-1) = x2; |
|
|
337 } |
|
3322
|
338 else if (n == 1) |
|
|
339 { |
|
|
340 if (x1 == x2) |
|
|
341 { |
|
|
342 retval.resize (1); |
|
|
343 retval.elem (0) = x1; |
|
|
344 } |
|
|
345 else |
|
|
346 (*current_liboctave_error_handler) |
|
|
347 ("linspace: npoints is 1, but x1 != x2"); |
|
|
348 } |
|
|
349 else |
|
|
350 (*current_liboctave_error_handler) |
|
|
351 ("linspace: npoints must be greater than 0"); |
|
1205
|
352 |
|
|
353 return retval; |
|
|
354 } |
|
|
355 |
|
|
356 // row vector by column vector -> scalar |
|
|
357 |
|
|
358 double |
|
|
359 operator * (const RowVector& v, const ColumnVector& a) |
|
|
360 { |
|
1947
|
361 double retval = 0.0; |
|
|
362 |
|
1205
|
363 int len = v.length (); |
|
1947
|
364 |
|
2386
|
365 int a_len = a.length (); |
|
|
366 |
|
|
367 if (len != a_len) |
|
|
368 gripe_nonconformant ("operator *", len, a_len); |
|
1947
|
369 else if (len != 0) |
|
3887
|
370 retval = F77_FUNC (ddot, DDOT) (len, v.data (), 1, a.data (), 1); |
|
1205
|
371 |
|
1947
|
372 return retval; |
|
1205
|
373 } |
|
|
374 |
|
|
375 Complex |
|
|
376 operator * (const RowVector& v, const ComplexColumnVector& a) |
|
|
377 { |
|
|
378 ComplexRowVector tmp (v); |
|
|
379 return tmp * a; |
|
|
380 } |
|
|
381 |
|
458
|
382 /* |
|
|
383 ;;; Local Variables: *** |
|
|
384 ;;; mode: C++ *** |
|
|
385 ;;; End: *** |
|
|
386 */ |
