Mercurial > octave-nkf

comparison src/DLD-FUNCTIONS/dasrt.cc @ 10840:89f4d7e294cc

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Grammarcheck .cc files
author Rik <octave@nomad.inbox5.com>
date Sat, 31 Jul 2010 11:18:11 -0700
parents 3140cb7a05a1
children a4f482e66b65
comparison
equal deleted inserted replaced
10839:65bc065bec95 10840:89f4d7e294cc
296 @example\n\ 296 @example\n\
297 @var{g_out} = g (@var{x}, @var{t})\n\ 297 @var{g_out} = g (@var{x}, @var{t})\n\
298 @end example\n\ 298 @end example\n\
299 \n\ 299 \n\
300 and return a vector of the constraint function values.\n\ 300 and return a vector of the constraint function values.\n\
301 If the value of any of the constraint functions changes sign, @sc{Dasrt}\n\ 301 If the value of any of the constraint functions changes sign, @sc{dasrt}\n\
302 will attempt to stop the integration at the point of the sign change.\n\ 302 will attempt to stop the integration at the point of the sign change.\n\
303 \n\ 303 \n\
304 If the name of the constraint function is omitted, @code{dasrt} solves\n\ 304 If the name of the constraint function is omitted, @code{dasrt} solves\n\
305 the same problem as @code{daspk} or @code{dassl}.\n\ 305 the same problem as @code{daspk} or @code{dassl}.\n\
306 \n\ 306 \n\
307 Note that because of numerical errors in the constraint functions\n\ 307 Note that because of numerical errors in the constraint functions\n\
308 due to round-off and integration error, @sc{Dasrt} may return false\n\ 308 due to round-off and integration error, @sc{dasrt} may return false\n\
309 roots, or return the same root at two or more nearly equal values of\n\ 309 roots, or return the same root at two or more nearly equal values of\n\
310 @var{T}. If such false roots are suspected, the user should consider\n\ 310 @var{T}. If such false roots are suspected, the user should consider\n\
311 smaller error tolerances or higher precision in the evaluation of the\n\ 311 smaller error tolerances or higher precision in the evaluation of the\n\
312 constraint functions.\n\ 312 constraint functions.\n\
313 \n\ 313 \n\
314 If a root of some constraint function defines the end of the problem,\n\ 314 If a root of some constraint function defines the end of the problem,\n\
315 the input to @sc{Dasrt} should nevertheless allow integration to a\n\ 315 the input to @sc{dasrt} should nevertheless allow integration to a\n\
316 point slightly past that root, so that @sc{Dasrt} can locate the root\n\ 316 point slightly past that root, so that @sc{dasrt} can locate the root\n\
317 by interpolation.\n\ 317 by interpolation.\n\
318 \n\ 318 \n\
319 The third and fourth arguments to @code{dasrt} specify the initial\n\ 319 The third and fourth arguments to @code{dasrt} specify the initial\n\
320 condition of the states and their derivatives, and the fourth argument\n\ 320 condition of the states and their derivatives, and the fourth argument\n\
321 specifies a vector of output times at which the solution is desired,\n\ 321 specifies a vector of output times at which the solution is desired,\n\
322 including the time corresponding to the initial condition.\n\ 322 including the time corresponding to the initial condition.\n\
323 \n\ 323 \n\
324 The set of initial states and derivatives are not strictly required to\n\ 324 The set of initial states and derivatives are not strictly required to\n\
325 be consistent. In practice, however, @sc{Dassl} is not very good at\n\ 325 be consistent. In practice, however, @sc{dassl} is not very good at\n\
326 determining a consistent set for you, so it is best if you ensure that\n\ 326 determining a consistent set for you, so it is best if you ensure that\n\
327 the initial values result in the function evaluating to zero.\n\ 327 the initial values result in the function evaluating to zero.\n\
328 \n\ 328 \n\
329 The sixth argument is optional, and may be used to specify a set of\n\ 329 The sixth argument is optional, and may be used to specify a set of\n\
330 times that the DAE solver should not integrate past. It is useful for\n\ 330 times that the DAE solver should not integrate past. It is useful for\n\
331 avoiding difficulties with singularities and points where there is a\n\ 331 avoiding difficulties with singularities and points where there is a\n\
332 discontinuity in the derivative.\n\ 332 discontinuity in the derivative.\n\
333 \n\ 333 \n\
334 After a successful computation, the value of @var{istate} will be\n\ 334 After a successful computation, the value of @var{istate} will be\n\
335 greater than zero (consistent with the Fortran version of @sc{Dassl}).\n\ 335 greater than zero (consistent with the Fortran version of @sc{dassl}).\n\
336 \n\ 336 \n\
337 If the computation is not successful, the value of @var{istate} will be\n\ 337 If the computation is not successful, the value of @var{istate} will be\n\
338 less than zero and @var{msg} will contain additional information.\n\ 338 less than zero and @var{msg} will contain additional information.\n\
339 \n\ 339 \n\
340 You can use the function @code{dasrt_options} to set optional\n\ 340 You can use the function @code{dasrt_options} to set optional\n\