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annotate src/DLD-FUNCTIONS/dasrt.cc @ 10846:a4f482e66b65
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| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Sun, 01 Aug 2010 20:22:17 -0700 |
| parents | 89f4d7e294cc |
| children | fd0a3ac60b0e |
| rev | line source |
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| 3990 | 1 /* |
| 2 | |
| 8920 | 3 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2009 John W. Eaton |
| 3990 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 3990 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 3990 | 20 |
| 21 */ | |
| 22 | |
| 23 #ifdef HAVE_CONFIG_H | |
| 24 #include <config.h> | |
| 25 #endif | |
| 26 | |
| 4052 | 27 #include <iostream> |
| 3990 | 28 #include <string> |
| 29 | |
| 30 #include "DASRT.h" | |
| 31 #include "lo-mappers.h" | |
| 32 | |
| 33 #include "defun-dld.h" | |
| 34 #include "error.h" | |
| 35 #include "gripes.h" | |
| 36 #include "oct-obj.h" | |
| 37 #include "ov-fcn.h" | |
| 5729 | 38 #include "ov-cell.h" |
| 3990 | 39 #include "pager.h" |
| 40 #include "parse.h" | |
| 41 #include "unwind-prot.h" | |
| 42 #include "utils.h" | |
| 43 #include "variables.h" | |
| 44 | |
| 3998 | 45 #include "DASRT-opts.cc" |
| 46 | |
| 4115 | 47 // Global pointers for user defined function required by dasrt. |
| 3990 | 48 static octave_function *dasrt_f; |
| 49 static octave_function *dasrt_j; | |
| 50 static octave_function *dasrt_cf; | |
| 51 | |
| 4140 | 52 // Have we warned about imaginary values returned from user function? |
| 53 static bool warned_fcn_imaginary = false; | |
| 54 static bool warned_jac_imaginary = false; | |
| 55 static bool warned_cf_imaginary = false; | |
| 56 | |
| 3990 | 57 // Is this a recursive call? |
| 58 static int call_depth = 0; | |
| 59 | |
| 60 static ColumnVector | |
| 4628 | 61 dasrt_user_f (const ColumnVector& x, const ColumnVector& xdot, |
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62 double t, octave_idx_type&) |
| 3990 | 63 { |
| 64 ColumnVector retval; | |
| 65 | |
| 4628 | 66 assert (x.capacity () == xdot.capacity ()); |
| 3990 | 67 |
| 4628 | 68 octave_value_list args; |
| 3990 | 69 |
| 3993 | 70 args(2) = t; |
| 4628 | 71 args(1) = xdot; |
| 72 args(0) = x; | |
| 3990 | 73 |
| 74 if (dasrt_f) | |
| 75 { | |
| 76 octave_value_list tmp = dasrt_f->do_multi_index_op (1, args); | |
| 77 | |
| 78 if (error_state) | |
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79 { |
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80 gripe_user_supplied_eval ("dasrt"); |
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81 return retval; |
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82 } |
| 3990 | 83 |
| 84 if (tmp.length () > 0 && tmp(0).is_defined ()) | |
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85 { |
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86 if (! warned_fcn_imaginary && tmp(0).is_complex_type ()) |
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87 { |
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88 warning ("dasrt: ignoring imaginary part returned from user-supplied function"); |
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89 warned_fcn_imaginary = true; |
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90 } |
| 4140 | 91 |
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92 retval = ColumnVector (tmp(0).vector_value ()); |
| 3990 | 93 |
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94 if (error_state || retval.length () == 0) |
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95 gripe_user_supplied_eval ("dasrt"); |
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96 } |
| 3990 | 97 else |
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98 gripe_user_supplied_eval ("dasrt"); |
| 3990 | 99 } |
| 100 | |
| 101 return retval; | |
| 102 } | |
| 103 | |
| 104 static ColumnVector | |
| 105 dasrt_user_cf (const ColumnVector& x, double t) | |
| 106 { | |
| 107 ColumnVector retval; | |
| 108 | |
| 109 octave_value_list args; | |
| 110 | |
| 111 args(1) = t; | |
| 4628 | 112 args(0) = x; |
| 3990 | 113 |
| 114 if (dasrt_cf) | |
| 115 { | |
| 116 octave_value_list tmp = dasrt_cf->do_multi_index_op (1, args); | |
| 117 | |
| 118 if (error_state) | |
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119 { |
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120 gripe_user_supplied_eval ("dasrt"); |
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121 return retval; |
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122 } |
| 3990 | 123 |
| 124 if (tmp.length () > 0 && tmp(0).is_defined ()) | |
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125 { |
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126 if (! warned_cf_imaginary && tmp(0).is_complex_type ()) |
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127 { |
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128 warning ("dasrt: ignoring imaginary part returned from user-supplied constraint function"); |
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129 warned_cf_imaginary = true; |
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130 } |
| 4140 | 131 |
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132 retval = ColumnVector (tmp(0).vector_value ()); |
| 3990 | 133 |
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134 if (error_state || retval.length () == 0) |
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135 gripe_user_supplied_eval ("dasrt"); |
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136 } |
| 3990 | 137 else |
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138 gripe_user_supplied_eval ("dasrt"); |
| 3990 | 139 } |
| 140 | |
| 141 return retval; | |
| 142 } | |
| 143 | |
| 144 static Matrix | |
| 3993 | 145 dasrt_user_j (const ColumnVector& x, const ColumnVector& xdot, |
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146 double t, double cj) |
| 3990 | 147 { |
| 148 Matrix retval; | |
| 149 | |
| 4628 | 150 assert (x.capacity () == xdot.capacity ()); |
| 3990 | 151 |
| 3993 | 152 octave_value_list args; |
| 153 | |
| 154 args(3) = cj; | |
| 155 args(2) = t; | |
| 4628 | 156 args(1) = xdot; |
| 157 args(0) = x; | |
| 3990 | 158 |
| 3993 | 159 if (dasrt_j) |
| 160 { | |
| 161 octave_value_list tmp = dasrt_j->do_multi_index_op (1, args); | |
| 3990 | 162 |
| 163 if (error_state) | |
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164 { |
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165 gripe_user_supplied_eval ("dasrt"); |
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166 return retval; |
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167 } |
| 3990 | 168 |
| 3993 | 169 int tlen = tmp.length (); |
| 170 if (tlen > 0 && tmp(0).is_defined ()) | |
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171 { |
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172 if (! warned_jac_imaginary && tmp(0).is_complex_type ()) |
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173 { |
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174 warning ("dasrt: ignoring imaginary part returned from user-supplied jacobian function"); |
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175 warned_jac_imaginary = true; |
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176 } |
| 4140 | 177 |
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178 retval = tmp(0).matrix_value (); |
| 3990 | 179 |
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180 if (error_state || retval.length () == 0) |
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181 gripe_user_supplied_eval ("dasrt"); |
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182 } |
| 3990 | 183 else |
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184 gripe_user_supplied_eval ("dasrt"); |
| 3990 | 185 } |
| 186 | |
| 187 return retval; | |
| 188 } | |
| 189 | |
| 190 #define DASRT_ABORT \ | |
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191 return retval |
| 3990 | 192 |
| 193 #define DASRT_ABORT1(msg) \ | |
| 194 do \ | |
| 195 { \ | |
| 4035 | 196 ::error ("dasrt: " msg); \ |
| 3990 | 197 DASRT_ABORT; \ |
| 198 } \ | |
| 199 while (0) | |
| 200 | |
| 201 #define DASRT_ABORT2(fmt, arg) \ | |
| 202 do \ | |
| 203 { \ | |
| 4035 | 204 ::error ("dasrt: " fmt, arg); \ |
| 3990 | 205 DASRT_ABORT; \ |
| 206 } \ | |
| 207 while (0) | |
| 208 | |
| 3997 | 209 DEFUN_DLD (dasrt, args, nargout, |
| 3990 | 210 "-*- texinfo -*-\n\ |
| 4115 | 211 @deftypefn {Loadable Function} {[@var{x}, @var{xdot}, @var{t_out}, @var{istat}, @var{msg}] =} dasrt (@var{fcn} [, @var{g}], @var{x_0}, @var{xdot_0}, @var{t} [, @var{t_crit}])\n\ |
| 212 Solve the set of differential-algebraic equations\n\ | |
| 213 @tex\n\ | |
| 4852 | 214 $$ 0 = f (x, \\dot{x}, t) $$\n\ |
| 4115 | 215 with\n\ |
| 216 $$ x(t_0) = x_0, \\dot{x}(t_0) = \\dot{x}_0 $$\n\ | |
| 217 @end tex\n\ | |
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218 @ifnottex\n\ |
| 3990 | 219 \n\ |
| 220 @example\n\ | |
| 4852 | 221 0 = f (x, xdot, t)\n\ |
| 4115 | 222 @end example\n\ |
| 223 \n\ | |
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224 @noindent\n\ |
| 4115 | 225 with\n\ |
| 226 \n\ | |
| 227 @example\n\ | |
| 228 x(t_0) = x_0, xdot(t_0) = xdot_0\n\ | |
| 3990 | 229 @end example\n\ |
| 230 \n\ | |
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231 @end ifnottex\n\ |
| 4115 | 232 with functional stopping criteria (root solving).\n\ |
| 233 \n\ | |
| 234 The solution is returned in the matrices @var{x} and @var{xdot},\n\ | |
| 235 with each row in the result matrices corresponding to one of the\n\ | |
| 236 elements in the vector @var{t_out}. The first element of @var{t}\n\ | |
| 237 should be @math{t_0} and correspond to the initial state of the\n\ | |
| 238 system @var{x_0} and its derivative @var{xdot_0}, so that the first\n\ | |
| 239 row of the output @var{x} is @var{x_0} and the first row\n\ | |
| 240 of the output @var{xdot} is @var{xdot_0}.\n\ | |
| 241 \n\ | |
| 242 The vector @var{t} provides an upper limit on the length of the\n\ | |
| 243 integration. If the stopping condition is met, the vector\n\ | |
| 244 @var{t_out} will be shorter than @var{t}, and the final element of\n\ | |
| 245 @var{t_out} will be the point at which the stopping condition was met,\n\ | |
| 246 and may not correspond to any element of the vector @var{t}.\n\ | |
| 247 \n\ | |
| 8787 | 248 The first argument, @var{fcn}, is a string, inline, or function handle\n\ |
| 249 that names the function @math{f} to call to compute the vector of\n\ | |
| 250 residuals for the set of equations. It must have the form\n\ | |
| 3990 | 251 \n\ |
| 252 @example\n\ | |
| 4115 | 253 @var{res} = f (@var{x}, @var{xdot}, @var{t})\n\ |
| 3990 | 254 @end example\n\ |
| 255 \n\ | |
| 256 @noindent\n\ | |
| 4115 | 257 in which @var{x}, @var{xdot}, and @var{res} are vectors, and @var{t} is a\n\ |
| 258 scalar.\n\ | |
| 259 \n\ | |
| 8787 | 260 If @var{fcn} is a two-element string array or a two-element cell array\n\ |
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261 of strings, inline functions, or function handles, the first element names\n\ |
| 8787 | 262 the function @math{f} described above, and the second element names a\n\ |
| 263 function to compute the modified Jacobian\n\ | |
| 3990 | 264 \n\ |
| 4115 | 265 @tex\n\ |
| 266 $$\n\ | |
| 267 J = {\\partial f \\over \\partial x}\n\ | |
| 268 + c {\\partial f \\over \\partial \\dot{x}}\n\ | |
| 269 $$\n\ | |
| 270 @end tex\n\ | |
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271 @ifnottex\n\ |
| 3990 | 272 \n\ |
| 4115 | 273 @example\n\ |
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274 @group\n\ |
| 4115 | 275 df df\n\ |
| 276 jac = -- + c ------\n\ | |
| 277 dx d xdot\n\ | |
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278 @end group\n\ |
| 4115 | 279 @end example\n\ |
| 280 \n\ | |
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281 @end ifnottex\n\ |
| 4115 | 282 \n\ |
| 283 The modified Jacobian function must have the form\n\ | |
| 284 \n\ | |
| 285 @example\n\ | |
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286 @group\n\ |
| 3990 | 287 \n\ |
| 4115 | 288 @var{jac} = j (@var{x}, @var{xdot}, @var{t}, @var{c})\n\ |
| 289 \n\ | |
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290 @end group\n\ |
| 4115 | 291 @end example\n\ |
| 3990 | 292 \n\ |
| 4115 | 293 The optional second argument names a function that defines the\n\ |
| 294 constraint functions whose roots are desired during the integration.\n\ | |
| 295 This function must have the form\n\ | |
| 3990 | 296 \n\ |
| 4115 | 297 @example\n\ |
| 298 @var{g_out} = g (@var{x}, @var{t})\n\ | |
| 299 @end example\n\ | |
| 3990 | 300 \n\ |
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301 @noindent\n\ |
| 4115 | 302 and return a vector of the constraint function values.\n\ |
| 10840 | 303 If the value of any of the constraint functions changes sign, @sc{dasrt}\n\ |
| 4115 | 304 will attempt to stop the integration at the point of the sign change.\n\ |
| 305 \n\ | |
| 306 If the name of the constraint function is omitted, @code{dasrt} solves\n\ | |
| 4852 | 307 the same problem as @code{daspk} or @code{dassl}.\n\ |
| 3990 | 308 \n\ |
| 4115 | 309 Note that because of numerical errors in the constraint functions\n\ |
| 10840 | 310 due to round-off and integration error, @sc{dasrt} may return false\n\ |
| 4115 | 311 roots, or return the same root at two or more nearly equal values of\n\ |
| 312 @var{T}. If such false roots are suspected, the user should consider\n\ | |
| 313 smaller error tolerances or higher precision in the evaluation of the\n\ | |
| 314 constraint functions.\n\ | |
| 3990 | 315 \n\ |
| 4115 | 316 If a root of some constraint function defines the end of the problem,\n\ |
| 10840 | 317 the input to @sc{dasrt} should nevertheless allow integration to a\n\ |
| 318 point slightly past that root, so that @sc{dasrt} can locate the root\n\ | |
| 4115 | 319 by interpolation.\n\ |
| 3990 | 320 \n\ |
| 4115 | 321 The third and fourth arguments to @code{dasrt} specify the initial\n\ |
| 322 condition of the states and their derivatives, and the fourth argument\n\ | |
| 323 specifies a vector of output times at which the solution is desired,\n\ | |
| 324 including the time corresponding to the initial condition.\n\ | |
| 325 \n\ | |
| 326 The set of initial states and derivatives are not strictly required to\n\ | |
| 10840 | 327 be consistent. In practice, however, @sc{dassl} is not very good at\n\ |
| 4115 | 328 determining a consistent set for you, so it is best if you ensure that\n\ |
| 329 the initial values result in the function evaluating to zero.\n\ | |
| 3990 | 330 \n\ |
| 4115 | 331 The sixth argument is optional, and may be used to specify a set of\n\ |
| 332 times that the DAE solver should not integrate past. It is useful for\n\ | |
| 333 avoiding difficulties with singularities and points where there is a\n\ | |
| 334 discontinuity in the derivative.\n\ | |
| 3990 | 335 \n\ |
| 4115 | 336 After a successful computation, the value of @var{istate} will be\n\ |
| 10840 | 337 greater than zero (consistent with the Fortran version of @sc{dassl}).\n\ |
| 4115 | 338 \n\ |
| 339 If the computation is not successful, the value of @var{istate} will be\n\ | |
| 340 less than zero and @var{msg} will contain additional information.\n\ | |
| 3990 | 341 \n\ |
| 342 You can use the function @code{dasrt_options} to set optional\n\ | |
| 343 parameters for @code{dasrt}.\n\ | |
| 5694 | 344 @seealso{daspk, dasrt, lsode}\n\ |
| 5642 | 345 @end deftypefn") |
| 3990 | 346 { |
| 347 octave_value_list retval; | |
| 348 | |
| 4140 | 349 warned_fcn_imaginary = false; |
| 350 warned_jac_imaginary = false; | |
| 351 warned_cf_imaginary = false; | |
| 352 | |
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353 unwind_protect frame; |
| 3990 | 354 |
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355 frame.protect_var (call_depth); |
| 3990 | 356 call_depth++; |
| 357 | |
| 358 if (call_depth > 1) | |
| 359 DASRT_ABORT1 ("invalid recursive call"); | |
| 360 | |
| 361 int argp = 0; | |
| 362 | |
| 363 int nargin = args.length (); | |
| 364 | |
| 365 if (nargin < 4 || nargin > 6) | |
| 366 { | |
| 5823 | 367 print_usage (); |
| 3990 | 368 return retval; |
| 369 } | |
| 370 | |
| 5729 | 371 std::string fcn_name, fname, jac_name, jname; |
| 3990 | 372 dasrt_f = 0; |
| 373 dasrt_j = 0; | |
| 374 dasrt_cf = 0; | |
| 375 | |
| 376 // Check all the arguments. Are they the right animals? | |
| 377 | |
| 378 // Here's where I take care of f and j in one shot: | |
| 379 | |
| 380 octave_value f_arg = args(0); | |
| 381 | |
| 5729 | 382 if (f_arg.is_cell ()) |
| 3990 | 383 { |
| 5729 | 384 Cell c = f_arg.cell_value (); |
| 385 if (c.length() == 1) | |
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386 f_arg = c(0); |
| 5729 | 387 else if (c.length() == 2) |
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388 { |
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389 if (c(0).is_function_handle () || c(0).is_inline_function ()) |
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390 dasrt_f = c(0).function_value (); |
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391 else |
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392 { |
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393 fcn_name = unique_symbol_name ("__dasrt_fcn__"); |
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394 fname = "function y = "; |
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395 fname.append (fcn_name); |
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396 fname.append (" (x, xdot, t) y = "); |
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397 dasrt_f = extract_function |
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398 (c(0), "dasrt", fcn_name, fname, "; endfunction"); |
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399 } |
| 5729 | 400 |
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401 if (dasrt_f) |
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402 { |
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403 if (c(1).is_function_handle () || c(1).is_inline_function ()) |
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404 dasrt_j = c(1).function_value (); |
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405 else |
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406 { |
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407 jac_name = unique_symbol_name ("__dasrt_jac__"); |
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408 jname = "function jac = "; |
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409 jname.append(jac_name); |
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410 jname.append (" (x, xdot, t, cj) jac = "); |
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411 dasrt_j = extract_function |
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412 (c(1), "dasrt", jac_name, jname, "; endfunction"); |
| 5729 | 413 |
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414 if (!dasrt_j) |
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415 { |
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416 if (fcn_name.length()) |
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417 clear_function (fcn_name); |
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418 dasrt_f = 0; |
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419 } |
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420 } |
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421 } |
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422 } |
| 5729 | 423 else |
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424 DASRT_ABORT1 ("incorrect number of elements in cell array"); |
| 5729 | 425 } |
| 426 | |
| 427 if (!dasrt_f && ! f_arg.is_cell()) | |
| 428 { | |
| 429 if (f_arg.is_function_handle () || f_arg.is_inline_function ()) | |
|
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430 dasrt_f = f_arg.function_value (); |
| 5729 | 431 else |
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432 { |
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433 switch (f_arg.rows ()) |
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434 { |
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435 case 1: |
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436 fcn_name = unique_symbol_name ("__dasrt_fcn__"); |
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437 fname = "function y = "; |
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438 fname.append (fcn_name); |
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439 fname.append (" (x, xdot, t) y = "); |
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440 dasrt_f = extract_function |
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441 (f_arg, "dasrt", fcn_name, fname, "; endfunction"); |
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442 break; |
| 3990 | 443 |
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444 case 2: |
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445 { |
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446 string_vector tmp = args(0).all_strings (); |
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447 |
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448 if (! error_state) |
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449 { |
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450 fcn_name = unique_symbol_name ("__dasrt_fcn__"); |
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451 fname = "function y = "; |
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452 fname.append (fcn_name); |
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453 fname.append (" (x, xdot, t) y = "); |
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454 dasrt_f = extract_function |
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455 (tmp(0), "dasrt", fcn_name, fname, "; endfunction"); |
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456 |
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457 if (dasrt_f) |
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458 { |
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459 jac_name = unique_symbol_name ("__dasrt_jac__"); |
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460 jname = "function jac = "; |
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461 jname.append(jac_name); |
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462 jname.append (" (x, xdot, t, cj) jac = "); |
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463 dasrt_j = extract_function |
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464 (tmp(1), "dasrt", jac_name, jname, "; endfunction"); |
| 5729 | 465 |
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466 if (! dasrt_j) |
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467 dasrt_f = 0; |
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468 } |
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469 } |
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470 } |
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471 break; |
| 3990 | 472 |
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473 default: |
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474 DASRT_ABORT1 |
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475 ("first arg should be a string or 2-element string array"); |
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476 } |
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477 } |
| 3990 | 478 } |
| 479 | |
| 480 if (error_state || (! dasrt_f)) | |
| 481 DASRT_ABORT; | |
| 482 | |
| 483 DAERTFunc func (dasrt_user_f); | |
| 484 | |
| 485 argp++; | |
| 486 | |
| 5729 | 487 if (args(1).is_function_handle() || args(1).is_inline_function()) |
| 488 { | |
| 489 dasrt_cf = args(1).function_value(); | |
| 490 | |
| 491 if (! dasrt_cf) | |
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492 DASRT_ABORT1 ("expecting function name as argument 2"); |
| 5729 | 493 |
| 494 argp++; | |
| 495 | |
| 496 func.set_constraint_function (dasrt_user_cf); | |
| 497 } | |
| 498 else if (args(1).is_string ()) | |
| 3990 | 499 { |
| 500 dasrt_cf = is_valid_function (args(1), "dasrt", true); | |
| 501 if (! dasrt_cf) | |
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502 DASRT_ABORT1 ("expecting function name as argument 2"); |
| 3990 | 503 |
| 504 argp++; | |
| 505 | |
| 506 func.set_constraint_function (dasrt_user_cf); | |
| 507 } | |
| 508 | |
| 509 ColumnVector state (args(argp++).vector_value ()); | |
| 510 | |
| 511 if (error_state) | |
| 512 DASRT_ABORT2 ("expecting state vector as argument %d", argp); | |
| 513 | |
| 3992 | 514 ColumnVector stateprime (args(argp++).vector_value ()); |
| 3990 | 515 |
| 516 if (error_state) | |
| 517 DASRT_ABORT2 | |
| 518 ("expecting time derivative of state vector as argument %d", argp); | |
| 519 | |
| 3994 | 520 ColumnVector out_times (args(argp++).vector_value ()); |
| 3990 | 521 |
| 522 if (error_state) | |
| 523 DASRT_ABORT2 | |
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524 ("expecting output time vector as %s argument %d", argp); |
| 3990 | 525 |
| 3994 | 526 double tzero = out_times (0); |
| 3990 | 527 |
| 528 ColumnVector crit_times; | |
| 529 | |
| 530 bool crit_times_set = false; | |
| 531 | |
| 532 if (argp < nargin) | |
| 533 { | |
| 534 crit_times = ColumnVector (args(argp++).vector_value ()); | |
| 535 | |
| 536 if (error_state) | |
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537 DASRT_ABORT2 |
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538 ("expecting critical time vector as argument %d", argp); |
| 3990 | 539 |
| 540 crit_times_set = true; | |
| 541 } | |
| 542 | |
| 543 if (dasrt_j) | |
| 544 func.set_jacobian_function (dasrt_user_j); | |
| 545 | |
| 546 DASRT_result output; | |
| 547 | |
| 3992 | 548 DASRT dae = DASRT (state, stateprime, tzero, func); |
| 3990 | 549 |
| 4122 | 550 dae.set_options (dasrt_opts); |
| 3990 | 551 |
| 552 if (crit_times_set) | |
| 553 output = dae.integrate (out_times, crit_times); | |
| 554 else | |
| 555 output = dae.integrate (out_times); | |
| 556 | |
| 5729 | 557 if (fcn_name.length()) |
| 558 clear_function (fcn_name); | |
| 559 if (jac_name.length()) | |
| 560 clear_function (jac_name); | |
| 561 | |
| 3990 | 562 if (! error_state) |
| 563 { | |
| 3997 | 564 std::string msg = dae.error_message (); |
| 565 | |
| 566 retval(4) = msg; | |
| 567 retval(3) = static_cast<double> (dae.integration_state ()); | |
| 568 | |
| 569 if (dae.integration_ok ()) | |
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570 { |
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571 retval(2) = output.times (); |
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572 retval(1) = output.deriv (); |
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573 retval(0) = output.state (); |
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574 } |
| 3997 | 575 else |
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576 { |
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577 retval(2) = Matrix (); |
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578 retval(1) = Matrix (); |
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579 retval(0) = Matrix (); |
| 3997 | 580 |
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581 if (nargout < 4) |
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582 error ("dasrt: %s", msg.c_str ()); |
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583 } |
| 3990 | 584 } |
| 585 | |
| 586 return retval; | |
| 587 } |