Mercurial > octave-nkf
annotate scripts/ode/private/integrate_n_steps.m @ 20580:25623ef2ff4f
doc: Rewrite docstrings for ode* family of functions.
* scripts/ode/module.mk: Remove extra newline.
* ode45.m, odeget.m, odeset.m: Rewrite docstrings.
* AbsRel_Norm.m, fuzzy_compare.m, hermite_quartic_interpolation.m,
integrate_adaptive.m, integrate_const.m, integrate_n_steps.m, kahan.m,
ode_struct_value_check.m, odepkg_event_handle.m, odepkg_structure_check.m,
runge_kutta_45_dorpri.m, starting_stepsize.m:
Don't break @deftypefn lines. Wrap lines at 80 columns rather than 72.
author | Rik <rik@octave.org> |
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date | Sat, 03 Oct 2015 21:03:16 -0700 |
parents | 6256f6e366ac |
children | eb9e2d187ed2 |
rev | line source |
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1 ## Copyright (C) 2013, Roberto Porcu' <roberto.porcu@polimi.it> |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 3 of the License, or (at |
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8 ## your option) any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {[@var{t}, @var{y}] =} integrate_n_steps (@var{@@stepper}, @var{@@fun}, @var{t0}, @var{x0}, @var{dt}, @var{n}, @var{options}) |
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21 ## |
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22 ## This function file can be called by an ODE solver function in order to |
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23 ## integrate the set of ODEs on the interval @var{[t0,t0 + n*dt]} with a |
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24 ## constant timestep dt and on a fixed number of steps. |
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25 ## |
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26 ## This function must be called with two output arguments: @var{t} and @var{y}. |
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27 ## Variable @var{t} is a column vector and contains the time stamps, instead |
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28 ## @var{y} is a matrix in which each column refers to a different unknown of |
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29 ## the problem and the rows number is the same of @var{t} rows number so that |
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30 ## each row of @var{y} contains the values of all unknowns at the time |
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31 ## value contained in the corresponding row in @var{t}. |
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32 ## |
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33 ## The first input argument must be a function_handle or an inline function |
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34 ## representing the stepper, that is the function responsible for step-by-step |
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35 ## integration. This function discriminates one method from the others. |
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36 ## |
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37 ## The second input argument is the order of the stepper. It is needed to |
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38 ## compute the adaptive timesteps. |
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39 ## |
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40 ## The third input argument is a function_handle or an inline function that |
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41 ## defines the set of ODE: |
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42 ## |
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43 ## @ifhtml |
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44 ## @example |
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45 ## @math{y' = f(t,y)} |
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46 ## @end example |
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47 ## @end ifhtml |
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48 ## @ifnothtml |
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49 ## @math{y' = f(t,y)}. |
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50 ## @end ifnothtml |
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51 ## |
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52 ## The third input argument is the starting point for the integration. |
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53 ## |
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54 ## The fourth argument contains the initial conditions for the ODEs. |
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55 ## |
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56 ## The fifth input argument represents the fixed timestep while the sixth |
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57 ## contains the number of integration steps. |
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58 ## |
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59 ## The last argument is a struct with the options that may be |
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60 ## needed by the stepper. |
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61 ## @end deftypefn |
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62 ## |
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63 ## @seealso{integrate_adaptive, integrate_const} |
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64 |
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65 function solution = integrate_n_steps (stepper, func, t0, x0, dt, n, options) |
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66 |
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67 solution = struct; |
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68 |
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69 ## first values for time and solution |
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70 x = x0(:); |
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71 t = t0; |
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72 |
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73 vdirection = odeget (options, "vdirection", [], "fast"); |
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74 if (sign (dt) != vdirection) |
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75 error("OdePkg:InvalidArgument", |
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76 "option ''InitialStep'' has a wrong sign"); |
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77 endif |
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78 |
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79 comp = 0.0; |
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80 tk = t0; |
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81 options.comp = comp; |
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82 |
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83 ## Initialize the OutputFcn |
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84 if (options.vhaveoutputfunction) |
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85 if (options.vhaveoutputselection) |
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86 solution.vretout = x(options.OutputSel,end); |
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87 else |
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88 solution.vretout = x; |
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89 endif |
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90 feval (options.OutputFcn, tspan, solution.vretout, "init", |
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91 options.vfunarguments{:}); |
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92 endif |
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93 |
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94 ## Initialize the EventFcn |
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95 if (options.vhaveeventfunction) |
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96 odepkg_event_handle (options.Events, t(end), x, "init", |
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97 options.vfunarguments{:}); |
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98 endif |
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99 |
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100 solution.vcntloop = 2; |
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101 solution.vcntcycles = 1; |
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102 #vu = vinit; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
103 #vk = vu.' * zeros(1,6); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
104 vcntiter = 0; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
105 solution.vunhandledtermination = true; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
106 solution.vcntsave = 2; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
107 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
108 z = t; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
109 u = x; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
110 k_vals = feval (func, t , x, options.vfunarguments{:}); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
111 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
112 for i = 1:n |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
113 ## Compute the integration step from t to t+dt |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
114 [s, y, ~, k_vals] = stepper (func, z(end), u(:,end), dt, options, k_vals); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
115 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
116 [tk, comp] = kahan (tk, comp, dt); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
117 options.comp = comp; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
118 s(end) = tk; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
119 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
120 if (options.vhavenonnegative) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
121 x(options.NonNegative,end) = abs (x(options.NonNegative,end)); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
122 y(options.NonNegative,end) = abs (y(options.NonNegative,end)); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
123 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
124 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
125 if (options.vhaveoutputfunction && options.vhaverefine) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
126 vSaveVUForRefine = u(:,end); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
127 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
128 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
129 ## values on this interval for time and solution |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
130 z = [t(end);s]; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
131 u = [x(:,end),y]; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
132 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
133 if (mod (solution.vcntloop-1, options.OutputSave) == 0) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
134 x = [x,u(:,2:end)]; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
135 t = [t;z(2:end)]; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
136 solution.vcntsave = solution.vcntsave + 1; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
137 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
138 solution.vcntloop = solution.vcntloop + 1; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
139 vcntiter = 0; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
140 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
141 ## Call plot only if a valid result has been found, therefore this code |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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|
142 ## fragment has moved here. Stop integration if plot function returns false |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
143 if (options.vhaveoutputfunction) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
144 for vcnt = 0:options.Refine # Approximation between told and t |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
145 if (options.vhaverefine) # Do interpolation |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
146 vapproxtime = (vcnt + 1) / (options.Refine + 2); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
147 vapproxvals = (1 - vapproxtime) * vSaveVUForRefine ... |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
148 + (vapproxtime) * y(:,end); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
149 vapproxtime = s(end) + vapproxtime*dt; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
150 else |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
151 vapproxvals = x(:,end); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
152 vapproxtime = t(end); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
153 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
154 if (options.vhaveoutputselection) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
155 vapproxvals = vapproxvals(options.OutputSel); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
156 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
157 vpltret = feval (options.OutputFcn, vapproxtime, vapproxvals, [], |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
158 options.vfunarguments{:}); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
159 if (vpltret) # Leave refinement loop |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
160 break |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
161 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
162 endfor |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
163 if (vpltret) # Leave main loop |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
164 solution.vunhandledtermination = false; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
165 break |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
166 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
167 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
168 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
169 ## Call event only if a valid result has been found, therefore this |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
170 ## code fragment has moved here. Stop integration if veventbreak is |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
171 ## true |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
172 if (options.vhaveeventfunction) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
173 solution.vevent = odepkg_event_handle (options.Events, t(end), x(:,end), |
fcb792acab9b
Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
174 [], options.vfunarguments{:}); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
175 if (! isempty (solution.vevent{1}) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
176 && solution.vevent{1} == 1) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
177 t(solution.vcntloop-1,:) = solution.vevent{3}(end,:); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
178 x(:,solution.vcntloop-1) = solution.vevent{4}(end,:)'; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
179 solution.vunhandledtermination = false; |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
180 break |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
181 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
182 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
183 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
184 ## Update counters that count the number of iteration cycles |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
185 solution.vcntcycles = solution.vcntcycles + 1; # Needed for cost statistics |
fcb792acab9b
Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
186 vcntiter = vcntiter + 1; # Needed to find iteration problems |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
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parents:
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changeset
|
187 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
188 ## Stop solving because the last 1000 steps no successful valid |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
189 ## value has been found |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
190 if (vcntiter >= 5000) |
fcb792acab9b
Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
191 error (["Solving has not been successful. The iterative", |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
192 " integration loop exited at time t = %f before endpoint at", |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
193 " tend = %f was reached. This happened because the iterative", |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
194 " integration loop does not find a valid solution at this time", |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
195 " stamp. Try to reduce the value of ''InitialStep'' and/or", |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
196 " ''MaxStep'' with the command ''odeset''.\n"], |
fcb792acab9b
Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
197 s(end), tspan(end)); |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
198 endif |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
199 endfor |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
200 |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
201 ## Check if integration of the ode has been successful |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
202 #if (vdirection * z(end) < vdirection * tspan(end)) |
fcb792acab9b
Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
203 # if (solution.vunhandledtermination == true) |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
204 # error ("OdePkg:InvalidArgument", |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
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changeset
|
205 # ["Solving has not been successful. The iterative", |
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Moving ode45, odeset, odeget, and levenshtein from odepkg to core.
jcorno <jacopo.corno@gmail.com>
parents:
diff
changeset
|
206 # " integration loop exited at time t = %f", |
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207 # " before endpoint at tend = %f was reached. This may", |
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208 # " happen if the stepsize grows smaller than defined in", |
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209 # " vminstepsize. Try to reduce the value of ''InitialStep''", |
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210 # " and/or ''MaxStep'' with the command ''odeset''.\n"], |
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211 # z(end), tspan(end)); |
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212 # else |
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213 # warning ("OdePkg:InvalidArgument", |
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214 # ["Solver has been stopped by a call of ''break'' in the main", |
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215 # " iteration loop at time t = %f before endpoint at tend = %f", |
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216 # " was reached. This may happen because the @odeplot function", |
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217 # " returned ''true'' or the @event function returned", |
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218 # " ''true''.\n"], |
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219 # z(end), tspan(end)); |
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220 # endif |
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221 #endif |
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222 |
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223 solution.t = t; |
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224 solution.x = x'; |
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225 |
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226 endfunction |
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227 |
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228 ## Local Variables: *** |
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229 ## mode: octave *** |
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230 ## End: *** |