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<TITLE>MatFDColoringGetPerturbedColumns</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/MatFD/MatFDColoringGetPerturbedColumns.html "><small>Report Typos and Errors</small></a></div>
<A NAME="MatFDColoringGetPerturbedColumns"><H1>MatFDColoringGetPerturbedColumns</H1></A>
Returns the indices of the columns that that are currently being perturbed.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../MatFD/MatFDColoringGetPerturbedColumns.html#MatFDColoringGetPerturbedColumns">MatFDColoringGetPerturbedColumns</A>(<A HREF="../Mat/MatFDColoring.html#MatFDColoring">MatFDColoring</A> coloring,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *n,const <A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> *cols[])
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>coloring </B></TD><TD>- coloring context created with <A HREF="../MatFD/MatFDColoringCreate.html#MatFDColoringCreate">MatFDColoringCreate</A>()
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- the number of local columns being perturbed
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>cols </B></TD><TD>- the column indices, in global numbering
</TD></TR></TABLE>
<P>
<P>
Note: IF the matrix type is BAIJ, then the block column indices are returned
<P>
<H3><FONT COLOR="#CC3333">Fortran Note</FONT></H3>
This routine has a different interface for Fortran
<pre>
#include <petsc/finclude/petscmat.h>
</pre>
<pre>
use petscmat
</pre>
<pre>
<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A>, pointer :: array(:)
</pre>
<pre>
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> ierr
</pre>
<pre>
<A HREF="../Mat/MatFDColoring.html#MatFDColoring">MatFDColoring</A> i
</pre>
<pre>
call MatFDColoringGetPerturbedColumnsF90(i,array,ierr)
</pre>
<pre>
use the entries of array ...
</pre>
<pre>
call MatFDColoringRestorePerturbedColumnsF90(i,array,ierr)
</pre>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../MatFD/MatFDColoringCreate.html#MatFDColoringCreate">MatFDColoringCreate</A>(), <A HREF="../MatFD/MatFDColoringDestroy.html#MatFDColoringDestroy">MatFDColoringDestroy</A>(), <A HREF="../MatFD/MatFDColoringView.html#MatFDColoringView">MatFDColoringView</A>(), <A HREF="../MatFD/MatFDColoringApply.html#MatFDColoringApply">MatFDColoringApply</A>()
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/matfd/fdmatrix.c.html#MatFDColoringGetPerturbedColumns">src/mat/matfd/fdmatrix.c</A>
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