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<?xml version="1.0" encoding="UTF-8"?>
<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" xmlns:scilab="http://www.scilab.org" xml:lang="en" xml:id="PlotSparse">
<refnamediv>
<refname>PlotSparse</refname>
<refpurpose>plot the pattern of non nul elements of a sparse matrix </refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>PlotSparse(A [,style])</synopsis>
</refsynopsisdiv>
<refsection>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term>A </term>
<listitem>
<para>a sparse matrix</para>
</listitem>
</varlistentry>
<varlistentry>
<term>style </term>
<listitem>
<para>(optional) a string given the color and/or the marker type of the form "[color][mark]"
where color may be a number referring the color you want to use (in the current colormap).
If you use the std colormap then color may be one of the following letters :
</para>
<programlisting role="no-scilab-exec"><![CDATA[
k for black b for blue
r for red g for green
c for cyan m for magenta
y for yellow t for turquoise
G a dark green
]]></programlisting>
<para>
mark must be one of the following :
</para>
<programlisting role="no-scilab-exec"><![CDATA[
. point + plus
x cross * circled plus
D filled diamond d diamond
^ upper triangle v down triangle
o circle
]]></programlisting>
<para>
by default you have "b." (in fact the 2d color) and this is also forced in case of error.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>
plot the pattern of non nul elements of a sparse matrix :
each non nul element is drawn with a marker. For "big"
matrix use essentially the point . as marker
</para>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
[A,description,ref,mtype] = ReadHBSparse(SCI+"/modules/umfpack/examples/arc130.rua");
PlotSparse(A,"y+")
xtitle(ref + "." + mtype + " : " + description)
]]></programlisting>
<scilab:image>
[A,description,ref,mtype] = ReadHBSparse(SCI+"/modules/umfpack/examples/arc130.rua");
PlotSparse(A,"y+")
xtitle(ref + "." + mtype + " : " + description)
</scilab:image>
</refsection>
<refsection role="see also">
<title>See Also</title>
<simplelist type="inline">
<member>
<link linkend="ReadHBSparse">ReadHBSparse</link>
</member>
</simplelist>
</refsection>
</refentry>
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