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chain_letter_tree.html
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<html>
<head>
<title>
CHAIN_LETTER_TREE - Chain Letter Dendrogram Analysis
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055" >
<h1 align = "center">
CHAIN_LETTER_TREE <br> Chain Letter Dendrogram Analysis
</h1>
<hr>
<p>
<b>CHAIN_LETTER_TREE</b>
a MATLAB program which
analyzes a similarity matrix for 11 versions of a single chain letter
and produces a dendrogram or tree diagram that suggests the degrees
of relatedness and the evolutionary history of the letters.
</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>CHAIN_LETTER_TREE</b> is available in
<a href = "../../m_src/chain_letter_tree/chain_letter_tree.html">a MATLAB version.</a>
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../datasets/chain_letters/chain_letters.html">
CHAIN_LETTERS</a>,
a dataset directory which
contains several examples of chain letters.
</p>
<p>
<a href = "../../m_src/distance_to_position/distance_to_position.html">
DISTANCE_TO_POSITION</a>,
a MATLAB program which
estimates the positions of cities based on a city-to-city distance table.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "chain_letter_tree.m">chain_letter_tree.m</a>,
a MATLAB program to collate and plot the results of a classroom exercise,
in which a distance table was made for chain letters A through K;
</li>
<li>
<a href = "chain_letter_tree_output.txt">chain_letter_tree_output.txt</a>,
the printed output from the program, a copy of the estimated distances.
</li>
<li>
<a href = "chain_letter_tree.png">chain_letter_tree.png</a>,
a PNG file which displays MATLAB's dendrogram of the chain letter distances,
using single linkage clustering;
</li>
<li>
<a href = "chain_letter_distance.txt">chain_letter_distance.txt</a>,
an 11x11 table of "distances" between every pair of chain letters.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Data:
</h3>
<p>
<ul>
<li>
<a href = "luck_a.txt">luck_a.txt</a>, example A;
</li>
<li>
<a href = "luck_b.txt">luck_b.txt</a>, example B;
</li>
<li>
<a href = "luck_c.txt">luck_c.txt</a>, example C;
</li>
<li>
<a href = "luck_d.txt">luck_d.txt</a>, example D;
</li>
<li>
<a href = "luck_e.txt">luck_e.txt</a>, example E;
quoted in <a href = "dawkins.txt">a letter to Nature, Volume 371, 1 September 1994,
by Oliver Goodenough and Richard Dawkins</a>.
</li>
<li>
<a href = "luck_f.txt">luck_f.txt</a>, example F;
</li>
<li>
<a href = "luck_g.txt">luck_g.txt</a>, example G;
</li>
<li>
<a href = "luck_h.txt">luck_h.txt</a>, example H;
</li>
<li>
<a href = "luck_i.txt">luck_i.txt</a>, example I;
appeared in the story "Philomena", by Jay McInerny,
The New Yorker, December 25, 1995 & 6 January 1, 1996.
</li>
<li>
<a href = "luck_j.txt">luck_j.txt</a>, example J;
</li>
<li>
<a href = "luck_k.txt">luck_k.txt</a>, example K;
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../m_src.html">
the MATLAB directory</a>.
</p>
<hr>
<i>
Last revised on 22 January 2014.
</i>
<!-- John Burkardt -->
</body>
</html>