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double_c_data.html
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<html>
<head>
<title>
DOUBLE_C_DATA - Create, Plot or Save a Double C Dataset.
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
DOUBLE_C_DATA <br> Create, Plot or Save a Double C Dataset.
</h1>
<hr>
<p>
<b>DOUBLE_C_DATA</b>
is a MATLAB library which
can create, plot, or save a "double C" dataset.
</p>
<p>
The data is confined to two separate regions, each having the shape of
the letter "C". The two regions are close, and interlocking, but do not
actually touch. This data represents a difficult challenge for algorithms
that attempt to detect natural segmentations of data.
</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>DOUBLE_C_DATA</b> is available in
<a href = "../../m_src/double_c_data/double_c_data.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../m_src/image_components/image_components.html">
IMAGE_COMPONENTS</a>,
a MATLAB library which
seeks the connected "nonzero" or "nonblack" components or "segments"
of an image or integer vector, array or 3D block.
</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,
including cluster analysis;
</p>
<p>
<a href = "../../datasets/mds/mds.html">
MDS</a>,
a dataset directory which
contains datasets for M-dimensional scaling;
</p>
<p>
<a href = "../../f_src/region/region.html">
REGION</a>,
a FORTRAN90 library which
reads 3D MRI voxel data, and groups the voxels into connected regions,
called "components" or "segments";
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "double_c_data.m">double_c_data.m</a>,
computes a double C dataset given N1 and N2.
</li>
<li>
<a href = "double_c_plot.m">double_c_plot.m</a>,
plots a double C dataset.
</li>
<li>
<a href = "double_c_data.m">double_c_data.m</a>,
writes a double C dataset to a file.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "double_c.png">double_c.png</a>,
a plot of the data for N1 = 800, N2 = 600.
</li>
<li>
<a href = "double_c_100_100.txt">double_c_100_100.txt</a>,
a data file with N1 = 100, N2 = 100.
</li>
<li>
<a href = "double_c_100_400.txt">double_c_100_400.txt</a>,
a data file with N1 = 100, N2 = 400.
</li>
<li>
<a href = "double_c_25_25.txt">double_c_25_25.txt</a>,
a data file with N1 = 25, N2 = 25.
</li>
<li>
<a href = "double_c_500_500.txt">double_c_500_500.txt</a>,
a data file with N1 = 500, N2 = 500.
</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 April 2011.
</i>
<!-- John Burkardt -->
</body>
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</html>