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<TITLE>PetscRandomSetFromOptions</TITLE>
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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.7.5 v3.7.5 docs/manualpages/Sys/PetscRandomSetFromOptions.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PetscRandomSetFromOptions"><H1>PetscRandomSetFromOptions</H1></A>
Configures the random number generator from the options database.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsys.h"
PetscErrorCode PetscRandomSetFromOptions(PetscRandom rnd)
</PRE>
Collective on <A HREF="../Sys/PetscRandom.html#PetscRandom">PetscRandom</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>rnd </B> -The random number generator context
<br>
<P>
<H3><FONT COLOR="#CC3333">Options Database</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-random_seed <integer> </B></TD><TD>- provide a seed to the random number generater
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-random_no_imaginary_part </B></TD><TD>- makes the imaginary part of the random number zero, this is useful when you want the
same code to produce the same result when run with real numbers or complex numbers for regression testing purposes
</TD></TR></TABLE>
<P>
Notes: To see all options, run your program with the -help option.
Must be called after <A HREF="../Sys/PetscRandomCreate.html#PetscRandomCreate">PetscRandomCreate</A>() but before the rnd is used.
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../Sys/PetscRandom.html#PetscRandom">PetscRandom</A>, set, options, database
<BR>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Sys/PetscRandomCreate.html#PetscRandomCreate">PetscRandomCreate</A>(), <A HREF="../Sys/PetscRandomSetType.html#PetscRandomSetType">PetscRandomSetType</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>beginner
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/classes/random/interface/randomc.c.html#PetscRandomSetFromOptions">src/sys/classes/random/interface/randomc.c</A>
<BR><A HREF="./index.html">Index of all Sys routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/sys/classes/random/examples/tutorials/ex1.c.html">src/sys/classes/random/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/sys/classes/random/examples/tutorials/ex2.c.html">src/sys/classes/random/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex2.c.html">src/ksp/ksp/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex11.c.html">src/ksp/ksp/examples/tutorials/ex11.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex18.c.html">src/ksp/ksp/examples/tutorials/ex18.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex46.c.html">src/ksp/ksp/examples/tutorials/ex46.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex52.c.html">src/ksp/ksp/examples/tutorials/ex52.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex2f.F.html">src/ksp/ksp/examples/tutorials/ex2f.F.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex11f.F.html">src/ksp/ksp/examples/tutorials/ex11f.F.html</A><BR>
<A HREF="../../../src/ts/examples/tutorials/ex42.c.html">src/ts/examples/tutorials/ex42.c.html</A><BR>
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