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<html>
<head>
<title>
SAMMON_DATA - Sample M-Dimensional Datasets for Cluster Analysis
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
SAMMON_DATA <br> Sample M-Dimensional Datasets for Cluster Analysis
</h1>
<hr>
<p>
<b>SAMMON_DATA</b>
is a MATLAB program which
generates 6 files of test data for multivariate data clustering.
</p>
<h3 align = "center">
Usage:
</h3>
<p>
<blockquote>
<b>sammon_data</b>
</blockquote>
</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>SAMMON_DATA</b> is available in
<a href = "../../m_src/sammon_data/sammon_data.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../m_src/asa113/asa113.html">
ASA113</a>,
a MATLAB library which
implements the Banfield and Bassill clustering algorithm using
transfers and swaps.
</p>
<p>
<a href = "../../m_src/asa136/asa136.html">
ASA136</a>,
a MATLAB library which
implements the Hartigan and Wong clustering algorithm.
</p>
<p>
<a href = "../../f_src/cluster_energy/cluster_energy.html">
CLUSTER_ENERGY</a>,
a FORTRAN90 program which
groups data into a given number of clusters to minimize the energy.
</p>
<p>
<a href = "../../m_src/kmeans/kmeans.html">
KMEANS</a>,
a MATLAB library which
contains several different algorithms for the K-Means problem.
</p>
<p>
<a href = "../../datasets/martinez/martinez.html">
MARTINEZ</a>,
a dataset directory which
contains datasets for computational statistics;
</p>
<p>
<a href = "../../datasets/mds/mds.html">
MDS</a>,
a dataset directory which
contains datasets for M-dimensional scaling;
</p>
<p>
<a href = "../../datasets/pcl/pcl.html">
PCL</a>,
a dataset directory which
contains datasets from a gene expression experiment on Arabidopsis,
which are candidates for data cluster analysis;
</p>
<p>
<a href = "../../datasets/spaeth/spaeth.html">
SPAETH</a>,
a dataset directory which
contains datasets for cluster analysis;
</p>
<p>
<a href = "../../f_src/spaeth/spaeth.html">
SPAETH</a>,
a FORTRAN90 library which
can cluster data according to various principles.
</p>
<p>
<a href = "../../datasets/spaeth2/spaeth2.html">
SPAETH2</a>,
a dataset directory which
contains datasets for cluster analysis;
</p>
<p>
<a href = "../../f_src/spaeth2/spaeth2.html">
SPAETH2</a>,
a FORTRAN90 library which
can cluster data according to various principles.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
Ronald Fisher,<br>
The use of multiple measurements in taxonomic problems,<br>
Annual Eugenics,<br>
Volume 7, part II, 1936, pages 179-188.
</li>
<li>
John Sammon,<br>
A nonlinear mapping for data structure analysis,<br>
IEEE Transactions on Computers,<br>
Volume C-18, Number 5, May 1969, pages 401-409.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "sammon_data.m">sammon_data.m</a>, the source code.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "sammon_data_output.txt">sammon_data_output.txt</a>,
the output file.
</li>
<li>
<a href = "sammon_circle.txt">sammon_circle.txt</a>, points on a circle.
</li>
<li>
<a href = "sammon_helix.txt">sammon_helix.txt</a>, points on a helix.
</li>
<li>
<a href = "sammon_iris.txt">sammon_iris.txt</a>, Fisher's iris data.
</li>
<li>
<a href = "sammon_linear.txt">sammon_linear.txt</a>, points on a line.
</li>
<li>
<a href = "sammon_nonlinear.txt">sammon_nonlinear.txt</a>,
points on a nonlinear curve.
</li>
<li>
<a href = "sammon_simplex.txt">sammon_simplex.txt</a>,
points clustered around the vertices of a simplex.
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>SAMMON_DATA</b> generates data for SAMMON tests.
</li>
<li>
<b>DATA_CIRCLE</b> writes the circle test data.
</li>
<li>
<b>DATA_HELIX</b> writes the helix test data.
</li>
<li>
<b>DATA_IRIS</b> writes the Iris test data.
</li>
<li>
<b>DATA_LINEAR</b> writes the straight line test data.
</li>
<li>
<b>DATA_NONLINEAR</b> writes the nonlinear test data.
</li>
<li>
<b>DATA_SIMPLEX</b> writes the nonlinear test data.
</li>
<li>
<b>R8MAT_WRITE</b> writes an R8MAT file.
</li>
<li>
<b>SIMPLEX_COORDINATES2</b> computes the Cartesian coordinates of simplex vertices.
</li>
<li>
<b>TIMESTAMP</b> prints the current YMDHMS date as a timestamp.
</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 20 September 2010.
</i>
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