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<TITLE>PetscRandomGetValueReal</TITLE>
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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</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-3.14.5 v3.14.5 docs/manualpages/Sys/PetscRandomGetValueReal.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PetscRandomGetValueReal"><H1>PetscRandomGetValueReal</H1></A>
Generates a purely real random number. Call this after first calling <A HREF="../Sys/PetscRandomCreate.html#PetscRandomCreate">PetscRandomCreate</A>().
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsys.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Sys/PetscRandomGetValueReal.html#PetscRandomGetValueReal">PetscRandomGetValueReal</A>(<A HREF="../Sys/PetscRandom.html#PetscRandom">PetscRandom</A> r,<A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *val)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Intput Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>r </B></TD><TD>- the random number generator context
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>val </B></TD><TD>- the value
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Use <A HREF="../Vec/VecSetRandom.html#VecSetRandom">VecSetRandom</A>() to set the elements of a vector to random numbers.
<P>
<H3><FONT COLOR="#CC3333">Example of Usage</FONT></H3>
<PRE>
<A HREF="../Sys/PetscRandomCreate.html#PetscRandomCreate">PetscRandomCreate</A>(<A HREF="../Sys/PETSC_COMM_WORLD.html#PETSC_COMM_WORLD">PETSC_COMM_WORLD</A>,&r);
<A HREF="../Sys/PetscRandomGetValueReal.html#PetscRandomGetValueReal">PetscRandomGetValueReal</A>(r,&value1);
<A HREF="../Sys/PetscRandomGetValueReal.html#PetscRandomGetValueReal">PetscRandomGetValueReal</A>(r,&value2);
<A HREF="../Sys/PetscRandomGetValueReal.html#PetscRandomGetValueReal">PetscRandomGetValueReal</A>(r,&value3);
<A HREF="../Sys/PetscRandomDestroy.html#PetscRandomDestroy">PetscRandomDestroy</A>(&r);
</PRE>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Sys/PetscRandomCreate.html#PetscRandomCreate">PetscRandomCreate</A>(), <A HREF="../Sys/PetscRandomDestroy.html#PetscRandomDestroy">PetscRandomDestroy</A>(), <A HREF="../Vec/VecSetRandom.html#VecSetRandom">VecSetRandom</A>(), <A HREF="../Sys/PetscRandomGetValue.html#PetscRandomGetValue">PetscRandomGetValue</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/sys/classes/random/interface/random.c.html#PetscRandomGetValueReal">src/sys/classes/random/interface/random.c</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/dm/tutorials/swarm_ex3.c.html">src/dm/tutorials/swarm_ex3.c.html</A><BR>
<A HREF="../../../src/dm/field/tutorials/ex1.c.html">src/dm/field/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/tutorials/ex21.c.html">src/ksp/ksp/tutorials/ex21.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/tutorials/ex70.c.html">src/ksp/ksp/tutorials/ex70.c.html</A><BR>
<A HREF="../../../src/snes/tutorials/ex12.c.html">src/snes/tutorials/ex12.c.html</A><BR>
<P><H3><FONT COLOR="CC3333">Implementations</FONT></H3><A HREF="../../../src/sys/classes/random/impls/rand/rand.c.html#PetscRandomGetValueReal_Rand">PetscRandomGetValueReal_Rand in src/sys/classes/random/impls/rand/rand.c</A><BR>
<A HREF="../../../src/sys/classes/random/impls/rand48/rand48.c.html#PetscRandomGetValueReal_Rand48">PetscRandomGetValueReal_Rand48 in src/sys/classes/random/impls/rand48/rand48.c</A><BR>
<A HREF="../../../src/sys/classes/random/impls/rander48/rander48.c.html#PetscRandomGetValueReal_Rander48">PetscRandomGetValueReal_Rander48 in src/sys/classes/random/impls/rander48/rander48.c</A><BR>
<A HREF="../../../src/sys/classes/random/impls/random123/random123.c.html#PetscRandomGetValueReal_Random123">PetscRandomGetValueReal_Random123 in src/sys/classes/random/impls/random123/random123.c</A><BR>
<A HREF="../../../src/sys/classes/random/impls/sprng/sprng.c.html#PetscRandomGetValueReal_Sprng">PetscRandomGetValueReal_Sprng in src/sys/classes/random/impls/sprng/sprng.c</A><BR>
<BR><A HREF="./index.html">Index of all Sys routines</A>
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