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<html>
<head>
<title>
PLASMA_MATRIX - Demonstrate Use of Harwell-Boeing Sparse Matrix Format
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
PLASMA_MATRIX <br> Demonstrate Use of Harwell-Boeing Sparse Matrix Format
</h1>
<hr>
<p>
<b>PLASMA_MATRIX</b>
is a MATLAB library which
demonstrates how a MATLAB sparse matrix can be written to a
Harwell-Boeing sparse matrix file for storage or transfer,
and then later retrieved.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>PLASMA_MATRIX</b> is available in
<a href = "../../m_src/plasma_matrix/plasma_matrix.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../m_src/hb_io/hb_io.html">
HB_IO</a>,
a MATLAB library which
reads and writes sparse linear systems stored in the Harwell-Boeing Sparse Matrix format.
</p>
<p>
<a href = "../../m_src/hb_to_msm/hb_to_msm.html">
HB_TO_MSM</a>,
a MATLAB program which
converts a Harwell Boeing sparse matrix to
MATLAB sparse matrix format.
</p>
<p>
<a href = "../../m_src/mm_to_hb/mm_to_hb.html">
MM_TO_HB</a>,
a MATLAB program which
reads the sparse matrix information from an MM Matrix Market file
and writes a corresponding HB Harwell Boeing file.
</p>
<p>
<a href = "../../m_src/mm_to_msm/mm_to_msm.html">
MM_TO_MSM</a>,
a MATLAB program which
reads a Matrix Market file defining a sparse matrix, and creates
a corresponding MATLAB sparse matrix data structure.
</p>
<p>
<a href = "../../m_src/msm_to_hb/msm_to_hb.html">
MSM_TO_HB</a>,
a MATLAB program which
writes a MATLAB sparse matrix to a Harwell Boeing (HB) file,
by Xiaoye Li.
</p>
<p>
<a href = "../../m_src/msm_to_mm/msm_to_mm.html">
MSM_TO_MM</a>,
a MATLAB program which
writes a MATLAB sparse matrix to a Matrix Market (MM) file;
</p>
<p>
<a href = "../../m_src/st_to_hb/st_to_hb.html">
ST_TO_HB</a>,
a MATLAB program which
converts a sparse matrix file from ST format to
Harwell Boeing (HB) format;
</p>
<p>
<a href = "../../m_src/test_mat/test_mat.html">
TEST_MAT</a>,
a MATLAB library which
defines test matrices with known inverses,
determinants, eigenvalues and so on.
</p>
<h3 align = "center">
Author:
</h3>
<p>
James Cheung wrote the code that defines the plasma matrix.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
Iain Duff, Roger Grimes, John Lewis,<br>
User's Guide for the Harwell-Boeing Sparse Matrix Collection,<br>
October 1992.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "hb_to_msm.m">hb_to_msm.m</a>,
creates a MATLAB Sparse matrix from data in a
Harwell Boeing Sparse Matrix file.
</li>
<li>
<a href = "msm_to_hb.m">msm_to_hb.m</a>,
writes a MATLAB Sparse matrix to a Harwell Boeing Sparse Matrix
file.
</li>
<li>
<a href = "plasma_matrix.m">plasma_matrix.m</a>,
computes a jacobian matrix J and residual function F associated
with a plasma simulation on an N by N grid.
</li>
<li>
<a href = "timestamp.m">timestamp.m</a>,
prints the current YMDHMS date as a timestamp.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "plasma_matrix_test.m">plasma_matrix_test.m</a>,
runs the tests.
</li>
<li>
<a href = "plasma_matrix_test_output.txt">plasma_matrix_test_output.txt</a>,
the output file.
</li>
<li>
<a href = "plasma_matrix_test01.m">plasma_matrix_test01.m</a>,
computes a plasma matrix, writes it to a file, and retrieves it.
</li>
<li>
<a href = "msm_to_hb_test01.hb">msm_to_hb_test01.hb</a>,
the HB file created by the test.
</li>
</ul>
</p>
<p>
The first test uses N = 5.
<ul>
<li>
<a href = "plasma_5_sparsity.png">plasma_5_sparsity.png</a>,
the matrix sparsity graph from MATLAB's spy() command.
</li>
<li>
<a href = "plasma_5_rua.txt">plasma_5_rua.txt</a>,
the Harwell-Boeing sparse matrix file.
</li>
</ul>
</p>
<p>
The second test uses N = 100.
<ul>
<li>
<a href = "plasma_100_sparsity.png">plasma_100_sparsity.png</a>,
the matrix sparsity graph from MATLAB's spy() command.
</li>
<li>
<a href = "plasma_100_rua.txt">plasma_100_rua.txt</a>,
the Harwell-Boeing sparse matrix file.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../m_src.html">
the MATLAB source codes</a>.
</p>
<hr>
<i>
Last revised on 21 January 2014.
</i>
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</body>
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</html>