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comparison liboctave/Quad.cc @ 289:c23f50e61c58

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[project @ 1994-01-13 06:25:58 by jwe]
author jwe
date Thu, 13 Jan 1994 06:26:54 +0000
parents 74d73a4b3fc7
children 3c23b8ea9099
comparison
equal deleted inserted replaced
288:f8ae4f4dc9fd 289:c23f50e61c58
22 */ 22 */
23 23
24 #ifdef HAVE_CONFIG_H 24 #ifdef HAVE_CONFIG_H
25 #include "config.h" 25 #include "config.h"
26 #endif 26 #endif
27
28 #include <math.h>
29 #include <float.h>
27 30
28 #include "Quad.h" 31 #include "Quad.h"
29 #include "f77-uscore.h" 32 #include "f77-uscore.h"
30 #include "sun-utils.h" 33 #include "sun-utils.h"
31 34
51 const int*, int*, int*, double*); 54 const int*, int*, int*, double*);
52 } 55 }
53 56
54 Quad::Quad (integrand_fcn fcn) 57 Quad::Quad (integrand_fcn fcn)
55 { 58 {
56 absolute_tolerance = 1.0e-6;
57 relative_tolerance = 1.0e-6;
58 f = fcn; 59 f = fcn;
59 } 60 }
60 61
61 Quad::Quad (integrand_fcn fcn, double abs, double rel) 62 Quad::Quad (integrand_fcn fcn, double abs, double rel)
62 { 63 {
63 absolute_tolerance = abs;
64 relative_tolerance = rel;
65 f = fcn; 64 f = fcn;
66 } 65 }
67 66
68 double 67 double
69 Quad::integrate (void) 68 Quad::integrate (void)
171 int *iwork = new int [leniw]; 170 int *iwork = new int [leniw];
172 double *work = new double [lenw]; 171 double *work = new double [lenw];
173 user_fcn = f; 172 user_fcn = f;
174 int last; 173 int last;
175 174
175 double abs_tol = absolute_tolerance ();
176 double rel_tol = relative_tolerance ();
177
176 F77_FCN (dqagp) (user_function, &lower_limit, &upper_limit, &npts, 178 F77_FCN (dqagp) (user_function, &lower_limit, &upper_limit, &npts,
177 points, &absolute_tolerance, &relative_tolerance, 179 points, &abs_tol, &rel_tol, &result, &abserr,
178 &result, &abserr, &neval, &ier, &leniw, &lenw, 180 &neval, &ier, &leniw, &lenw, &last, iwork, work);
179 &last, iwork, work);
180 181
181 delete [] iwork; 182 delete [] iwork;
182 delete [] work; 183 delete [] work;
183 184
184 return result; 185 return result;
237 default: 238 default:
238 assert (0); 239 assert (0);
239 break; 240 break;
240 } 241 }
241 242
242 F77_FCN (dqagi) (user_function, &bound, &inf, &absolute_tolerance, 243 double abs_tol = absolute_tolerance ();
243 &relative_tolerance, &result, &abserr, &neval, 244 double rel_tol = relative_tolerance ();
244 &ier, &leniw, &lenw, &last, iwork, work); 245
246 F77_FCN (dqagi) (user_function, &bound, &inf, &abs_tol, &rel_tol,
247 &result, &abserr, &neval, &ier, &leniw, &lenw,
248 &last, iwork, work);
245 249
246 delete [] iwork; 250 delete [] iwork;
247 delete [] work; 251 delete [] work;
248 252
249 return result; 253 return result;
254 }
255
256 Quad_options::Quad_options (void)
257 {
258 init ();
259 }
260
261 Quad_options::Quad_options (const Quad_options& opt)
262 {
263 copy (opt);
264 }
265
266 Quad_options&
267 Quad_options::operator = (const Quad_options& opt)
268 {
269 if (this != &opt)
270 copy (opt);
271
272 return *this;
273 }
274
275 Quad_options::~Quad_options (void)
276 {
277 }
278
279 void
280 Quad_options::init (void)
281 {
282 double sqrt_eps = sqrt (DBL_EPSILON);
283 x_absolute_tolerance = sqrt_eps;
284 x_relative_tolerance = sqrt_eps;
285 }
286
287 void
288 Quad_options::copy (const Quad_options& opt)
289 {
290 x_absolute_tolerance = opt.x_absolute_tolerance;
291 x_relative_tolerance = opt.x_relative_tolerance;
292 }
293
294 void
295 Quad_options::set_default_options (void)
296 {
297 init ();
298 }
299
300 void
301 Quad_options::set_absolute_tolerance (double val)
302 {
303 x_absolute_tolerance = (val > 0.0) ? val : sqrt (DBL_EPSILON);
304 }
305
306 void
307 Quad_options::set_relative_tolerance (double val)
308 {
309 x_relative_tolerance = (val > 0.0) ? val : sqrt (DBL_EPSILON);
310 }
311
312 double
313 Quad_options::absolute_tolerance (void)
314 {
315 return x_absolute_tolerance;
316 }
317
318 double
319 Quad_options::relative_tolerance (void)
320 {
321 return x_relative_tolerance;
250 } 322 }
251 323
252 /* 324 /*
253 ;;; Local Variables: *** 325 ;;; Local Variables: ***
254 ;;; mode: C++ *** 326 ;;; mode: C++ ***