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<A NAME="MatGetDiagonal"><H1>MatGetDiagonal</H1></A>
Gets the diagonal of a matrix.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
PetscErrorCode MatGetDiagonal(Mat mat,Vec v)
</PRE>
Collective on <A HREF="../Mat/Mat.html#Mat">Mat</A> and <A HREF="../Vec/Vec.html#Vec">Vec</A>
<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>mat </B></TD><TD>- the matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>v </B></TD><TD>- the vector for storing the diagonal
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>v </B> -the diagonal of the matrix
<br>
<P>
Notes: The result of this call are the same as if one converted the matrix to dense format
and found the minimum value in each row (i.e. the implicit zeros are counted as zeros).
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatGetRow.html#MatGetRow">MatGetRow</A>(), <A HREF="../Mat/MatGetSubMatrices.html#MatGetSubMatrices">MatGetSubMatrices</A>(), MatGetSubmatrix(), <A HREF="../Mat/MatGetRowMaxAbs.html#MatGetRowMaxAbs">MatGetRowMaxAbs</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/mat/interface/matrix.c.html#MatGetDiagonal">src/mat/interface/matrix.c</A>
<BR><A HREF="./index.html">Index of all Mat 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/ksp/pc/examples/tutorials/ex1.c.html">src/ksp/pc/examples/tutorials/ex1.c.html</A><BR>
<A HREF="../../../src/ksp/pc/examples/tutorials/ex2.c.html">src/ksp/pc/examples/tutorials/ex2.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex15.c.html">src/ksp/ksp/examples/tutorials/ex15.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex15f.F.html">src/ksp/ksp/examples/tutorials/ex15f.F.html</A><BR>
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