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<section class="tex2jax_ignore mathjax_ignore" id="tssetfromoptions">
<h1>TSSetFromOptions<a class="headerlink" href="#tssetfromoptions" title="Link to this heading">#</a></h1>
<p>Sets various <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/TS/TS.html">TS</a></span></code> parameters from the options database</p>
<section id="synopsis">
<h2>Synopsis<a class="headerlink" href="#synopsis" title="Link to this heading">#</a></h2>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#include</span><span class="w"> </span><span class="cpf">"petscts.h"</span><span class="c1"> </span>
<span class="n"><a href="../../manualpages/Sys/PetscErrorCode.html">PetscErrorCode</a></span><span class="w"> </span><span class="n"><a href="../../manualpages/TS/TSSetFromOptions.html">TSSetFromOptions</a></span><span class="p">(</span><span class="n"><a href="../../manualpages/TS/TS.html">TS</a></span><span class="w"> </span><span class="n">ts</span><span class="p">)</span>
</pre></div>
</div>
<p>Collective</p>
</section>
<section id="input-parameter">
<h2>Input Parameter<a class="headerlink" href="#input-parameter" title="Link to this heading">#</a></h2>
<ul class="simple">
<li><p><em><strong>ts -</strong></em> the <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/TS/TS.html">TS</a></span></code> context obtained from <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/TS/TSCreate.html">TSCreate</a>()</span></code></p></li>
</ul>
</section>
<section id="options-database-keys">
<h2>Options Database Keys<a class="headerlink" href="#options-database-keys" title="Link to this heading">#</a></h2>
<ul class="simple">
<li><p><em><strong>-ts_type <type> -</strong></em> EULER, BEULER, SUNDIALS, PSEUDO, CN, RK, THETA, ALPHA, GLLE, SSP, GLEE, BSYMP, IRK, see <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/TS/TSType.html">TSType</a></span></code></p></li>
<li><p><em><strong>-ts_save_trajectory -</strong></em> checkpoint the solution at each time-step</p></li>
<li><p><em><strong>-ts_max_time <time> -</strong></em> maximum time to compute to</p></li>
<li><p><em><strong>-ts_time_span <t0,…tf> -</strong></em> sets the time span, solutions are computed and stored for each indicated time, init_time and max_time are set</p></li>
<li><p><em><strong>-ts_eval_times <t0,…tn> -</strong></em> time points where solutions are computed and stored for each indicated time</p></li>
<li><p><em><strong>-ts_max_steps <steps> -</strong></em> maximum number of time-steps to take</p></li>
<li><p><em><strong>-ts_init_time <time> -</strong></em> initial time to start computation</p></li>
<li><p><em><strong>-ts_final_time <time> -</strong></em> final time to compute to (deprecated: use <code class="docutils notranslate"><span class="pre">-ts_max_time</span></code>)</p></li>
<li><p><em><strong>-ts_dt <dt> -</strong></em> initial time step</p></li>
<li><p><em><strong>-ts_exact_final_time <stepover,interpolate,matchstep> -</strong></em> whether to stop at the exact given final time and how to compute the solution at that time</p></li>
<li><p><em><strong>-ts_max_snes_failures <maxfailures> -</strong></em> Maximum number of nonlinear solve failures allowed</p></li>
<li><p><em><strong>-ts_max_reject <maxrejects> -</strong></em> Maximum number of step rejections before step fails</p></li>
<li><p><em><strong>-ts_error_if_step_fails <true,false> -</strong></em> Error if no step succeeds</p></li>
<li><p><em><strong>-ts_rtol <rtol> -</strong></em> relative tolerance for local truncation error</p></li>
<li><p><em><strong>-ts_atol <atol> -</strong></em> Absolute tolerance for local truncation error</p></li>
<li><p><em><strong>-ts_rhs_jacobian_test_mult -</strong></em> mat_shell_test_mult_view - test the Jacobian at each iteration against finite difference with RHS function</p></li>
<li><p><em><strong>-ts_rhs_jacobian_test_mult_transpose -</strong></em> test the Jacobian at each iteration against finite difference with RHS function</p></li>
<li><p><em><strong>-ts_adjoint_solve <yes,no> -</strong></em> After solving the ODE/DAE solve the adjoint problem (requires <code class="docutils notranslate"><span class="pre">-ts_save_trajectory</span></code>)</p></li>
<li><p><em><strong>-ts_fd_color -</strong></em> Use finite differences with coloring to compute IJacobian</p></li>
<li><p><em><strong>-ts_monitor -</strong></em> print information at each timestep</p></li>
<li><p><em><strong>-ts_monitor_cancel -</strong></em> Cancel all monitors</p></li>
<li><p><em><strong>-ts_monitor_lg_solution -</strong></em> Monitor solution graphically</p></li>
<li><p><em><strong>-ts_monitor_lg_error -</strong></em> Monitor error graphically</p></li>
<li><p><em><strong>-ts_monitor_error -</strong></em> Monitors norm of error</p></li>
<li><p><em><strong>-ts_monitor_lg_timestep -</strong></em> Monitor timestep size graphically</p></li>
<li><p><em><strong>-ts_monitor_lg_timestep_log -</strong></em> Monitor log timestep size graphically</p></li>
<li><p><em><strong>-ts_monitor_lg_snes_iterations -</strong></em> Monitor number nonlinear iterations for each timestep graphically</p></li>
<li><p><em><strong>-ts_monitor_lg_ksp_iterations -</strong></em> Monitor number nonlinear iterations for each timestep graphically</p></li>
<li><p><em><strong>-ts_monitor_sp_eig -</strong></em> Monitor eigenvalues of linearized operator graphically</p></li>
<li><p><em><strong>-ts_monitor_draw_solution -</strong></em> Monitor solution graphically</p></li>
<li><p><em><strong>-ts_monitor_draw_solution_phase <xleft,yleft,xright,yright> -</strong></em> Monitor solution graphically with phase diagram, requires problem with exactly 2 degrees of freedom</p></li>
<li><p><em><strong>-ts_monitor_draw_error -</strong></em> Monitor error graphically, requires use to have provided TSSetSolutionFunction()</p></li>
<li><p><em><strong>-ts_monitor_solution [ascii binary draw][:filename][:viewerformat] -</strong></em> monitors the solution at each timestep</p></li>
<li><p><em><strong>-ts_monitor_solution_interval <interval> -</strong></em> output once every interval (default=1) time steps. Use -1 to only output at the end of the simulation</p></li>
<li><p><em><strong>-ts_monitor_solution_vtk <filename.vts,filename.vtu> -</strong></em> Save each time step to a binary file, use filename-%%03” PetscInt_FMT “.vts (filename-%%03” PetscInt_FMT “.vtu)</p></li>
<li><p><em><strong>-ts_monitor_solution_vtk_interval <interval> -</strong></em> output once every interval (default=1) time steps. Use -1 to only output at the end of the simulation</p></li>
<li><p><em><strong>-ts_monitor_envelope -</strong></em> determine maximum and minimum value of each component of the solution over the solution time</p></li>
</ul>
</section>
<section id="notes">
<h2>Notes<a class="headerlink" href="#notes" title="Link to this heading">#</a></h2>
<p>See <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/SNES/SNESSetFromOptions.html">SNESSetFromOptions</a>()</span></code> and <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/KSP/KSPSetFromOptions.html">KSPSetFromOptions</a>()</span></code> for how to control the nonlinear and linear solves used by the time-stepper.</p>
<p>Certain <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/SNES/SNES.html">SNES</a></span></code> options get reset for each new nonlinear solver, for example <code class="docutils notranslate"><span class="pre">-snes_lag_jacobian</span> <span class="pre">its</span></code> and <code class="docutils notranslate"><span class="pre">-snes_lag_preconditioner</span> <span class="pre">its</span></code>, in order
to retain them over the multiple nonlinear solves that <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/TS/TS.html">TS</a></span></code> uses you must also provide <code class="docutils notranslate"><span class="pre">-snes_lag_jacobian_persists</span> <span class="pre">true</span></code> and
<code class="docutils notranslate"><span class="pre">-snes_lag_preconditioner_persists</span> <span class="pre">true</span></code></p>
</section>
<section id="developer-notes">
<h2>Developer Notes<a class="headerlink" href="#developer-notes" title="Link to this heading">#</a></h2>
<p>We should unify all the -ts_monitor options in the way that -xxx_view has been unified</p>
</section>
<section id="see-also">
<h2>See Also<a class="headerlink" href="#see-also" title="Link to this heading">#</a></h2>
<p><a class="reference internal" href="../../manual/ts.html#ch-ts"><span class="std std-ref">TS: Scalable ODE and DAE Solvers</span></a>, <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/TS/TS.html">TS</a></span></code>, <code class="docutils notranslate"><span class="pre"><a href="../../manualpages/TS/TSGetType.html">TSGetType</a>()</span></code></p>
</section>
<section id="level">
<h2>Level<a class="headerlink" href="#level" title="Link to this heading">#</a></h2>
<p>beginner</p>
</section>
<section id="location">
<h2>Location<a class="headerlink" href="#location" title="Link to this heading">#</a></h2>
<p><A HREF="../../src/ts/interface/ts.c.html#TSSetFromOptions">src/ts/interface/ts.c</A></p>
</section>
<section id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Link to this heading">#</a></h2>
<p><A HREF="../../src/ts/tutorials/ex16fwd.c.html">src/ts/tutorials/ex16fwd.c</A><BR>
<A HREF="../../src/tao/unconstrained/tutorials/spectraladjointassimilation.c.html">src/tao/unconstrained/tutorials/spectraladjointassimilation.c</A><BR>
<A HREF="../../src/ts/tutorials/ex17.c.html">src/ts/tutorials/ex17.c</A><BR>
<A HREF="../../src/tao/unconstrained/tutorials/burgers_spectral.c.html">src/tao/unconstrained/tutorials/burgers_spectral.c</A><BR>
<A HREF="../../src/ts/tutorials/ex16.c.html">src/ts/tutorials/ex16.c</A><BR>
<A HREF="../../src/ts/tutorials/ex1.c.html">src/ts/tutorials/ex1.c</A><BR>
<A HREF="../../src/ts/tutorials/ex13.c.html">src/ts/tutorials/ex13.c</A><BR>
<A HREF="../../src/ts/tutorials/ex11_sa.c.html">src/ts/tutorials/ex11_sa.c</A><BR>
<A HREF="../../src/ts/tutorials/ex10.c.html">src/ts/tutorials/ex10.c</A><BR>
<A HREF="../../src/ts/tutorials/ex19.c.html">src/ts/tutorials/ex19.c</A><BR></p>
</section>
<section id="implementations">
<h2>Implementations<a class="headerlink" href="#implementations" title="Link to this heading">#</a></h2>
<p><A HREF="../../src/ts/impls/arkimex/arkimex.c.html#TSSetFromOptions_ARKIMEX">TSSetFromOptions_ARKIMEX() in src/ts/impls/arkimex/arkimex.c</A><BR>
<A HREF="../../src/ts/impls/bdf/bdf.c.html#TSSetFromOptions_BDF">TSSetFromOptions_BDF() in src/ts/impls/bdf/bdf.c</A><BR>
<A HREF="../../src/ts/impls/eimex/eimex.c.html#TSSetFromOptions_EIMEX">TSSetFromOptions_EIMEX() in src/ts/impls/eimex/eimex.c</A><BR>
<A HREF="../../src/ts/impls/explicit/euler/euler.c.html#TSSetFromOptions_Euler">TSSetFromOptions_Euler() in src/ts/impls/explicit/euler/euler.c</A><BR>
<A HREF="../../src/ts/impls/explicit/rk/rk.c.html#TSSetFromOptions_RK">TSSetFromOptions_RK() in src/ts/impls/explicit/rk/rk.c</A><BR>
<A HREF="../../src/ts/impls/explicit/ssp/ssp.c.html#TSSetFromOptions_SSP">TSSetFromOptions_SSP() in src/ts/impls/explicit/ssp/ssp.c</A><BR>
<A HREF="../../src/ts/impls/glee/glee.c.html#TSSetFromOptions_GLEE">TSSetFromOptions_GLEE() in src/ts/impls/glee/glee.c</A><BR>
<A HREF="../../src/ts/impls/implicit/alpha/alpha1.c.html#TSSetFromOptions_Alpha">TSSetFromOptions_Alpha() in src/ts/impls/implicit/alpha/alpha1.c</A><BR>
<A HREF="../../src/ts/impls/implicit/alpha/alpha2.c.html#TSSetFromOptions_Alpha">TSSetFromOptions_Alpha() in src/ts/impls/implicit/alpha/alpha2.c</A><BR>
<A HREF="../../src/ts/impls/implicit/discgrad/tsdiscgrad.c.html#TSSetFromOptions_DiscGrad">TSSetFromOptions_DiscGrad() in src/ts/impls/implicit/discgrad/tsdiscgrad.c</A><BR>
<A HREF="../../src/ts/impls/implicit/glle/glle.c.html#TSSetFromOptions_GLLE">TSSetFromOptions_GLLE() in src/ts/impls/implicit/glle/glle.c</A><BR>
<A HREF="../../src/ts/impls/implicit/irk/irk.c.html#TSSetFromOptions_IRK">TSSetFromOptions_IRK() in src/ts/impls/implicit/irk/irk.c</A><BR>
<A HREF="../../src/ts/impls/implicit/sundials/sundials.c.html#TSSetFromOptions_Sundials">TSSetFromOptions_Sundials() in src/ts/impls/implicit/sundials/sundials.c</A><BR>
<A HREF="../../src/ts/impls/implicit/theta/theta.c.html#TSSetFromOptions_Theta">TSSetFromOptions_Theta() in src/ts/impls/implicit/theta/theta.c</A><BR>
<A HREF="../../src/ts/impls/mimex/mimex.c.html#TSSetFromOptions_Mimex">TSSetFromOptions_Mimex() in src/ts/impls/mimex/mimex.c</A><BR>
<A HREF="../../src/ts/impls/multirate/mprk.c.html#TSSetFromOptions_MPRK">TSSetFromOptions_MPRK() in src/ts/impls/multirate/mprk.c</A><BR>
<A HREF="../../src/ts/impls/pseudo/posindep.c.html#TSSetFromOptions_Pseudo">TSSetFromOptions_Pseudo() in src/ts/impls/pseudo/posindep.c</A><BR>
<A HREF="../../src/ts/impls/rosw/rosw.c.html#TSSetFromOptions_RosW">TSSetFromOptions_RosW() in src/ts/impls/rosw/rosw.c</A><BR>
<A HREF="../../src/ts/impls/symplectic/basicsymplectic/basicsymplectic.c.html#TSSetFromOptions_BasicSymplectic">TSSetFromOptions_BasicSymplectic() in src/ts/impls/symplectic/basicsymplectic/basicsymplectic.c</A><BR></p>
<hr class="docutils" />
<p><a class="reference internal" href="index.html"><span class="std std-doc">Index of all TS routines</span></a><br />
<a class="reference internal" href="../index.html"><span class="std std-doc">Table of Contents for all manual pages</span></a><br />
<a class="reference internal" href="../singleindex.html"><span class="std std-doc">Index of all manual pages</span></a></p>
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