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<html>
<head>
<title>
ASA144 - Random generation of a table.
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
ASA144 <br> Random generation of a table.
</h1>
<hr>
<p>
<b>ASA144</b>
is a MATLAB library which
randomly generates an RxC contingency table,
by James Boyett.
</p>
<p>
<b>ASA144</b> is Applied Statistics Algorithm 144. Source code for many
Applied Statistics Algorithms is available through
<a href = "http://lib.stat.cmu.edu/apstat">STATLIB</a>.
</p>
<p>
<b>ASA144</b> accepts a table shape (the number of rows and columns),
and two vectors, the lists of row and column sums. There may be 0, 1, or
many tables with nonnegative, integral entries that have the given
shape and sums. The program will generate, at random, one of the
tables and return it. Repeated calls to the program will return
new random selections.
</p>
<p>
For example, suppose M = 2, N = 3, row sum = (/ 6, 5 /) and
column sum = (/ 3, 4, 4 /), then here are two tables that satisfy
the constraints:
<pre>
1 2 3
2 2 1
</pre>
and
<pre>
3 0 3
0 4 1
</pre>
</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>ASA144</b> is available in
<a href = "../../c_src/asa144/asa144.html"> a C version</a> and
<a href = "../../cpp_src/asa144/asa144.html"> a C++ version</a> and
<a href = "../../f77_src/asa144/asa144.html"> a FORTRAN77 version</a> and
<a href = "../../f_src/asa144/asa144.html"> a FORTRAN90 version</a> and
<a href = "../../m_src/asa144/asa144.html"> a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../m_src/asa159/asa159.html">
ASA159</a>,
a MATLAB library which
randomly generates an RxC contingency table.
</p>
<p>
<a href = "../../m_src/subset/subset.html">
SUBSET</a>,
a MATLAB library which
includes a routine called <b>IMAT_01_ROWCOLSUM</b> which
generates a (0,1) matrix with given row and column sums.
</p>
<h3 align = "center">
Author:
</h3>
<p>
Original FORTRAN77 version by James Boyett;
MATLAB version by John Burkardt.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
James Boyett,<br>
Algorithm AS 144:
Random R x C Tables with Given Row and Column Totals,<br>
Applied Statistics,<br>
Volume 28, Number 3, 1979, pages 329-332.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "i4mat_print.m">i4mat_print.m</a>
prints an integer matrix.
</li>
<li>
<a href = "i4mat_print_some.m">i4mat_print_some.m</a>
prints some of an integer matrix.
</li>
<li>
<a href = "i4vec_print.m">i4vec_print.m</a>
prints an integer vector.
</li>
<li>
<a href = "r8_uniform_01.m">r8_uniform_01.m</a>
returns a unit double precision pseudorandom number.
</li>
<li>
<a href = "rcont.m">rcont.m</a>
generates a random two-way table with given marginal totals.
</li>
<li>
<a href = "s_len_trim.m">s_len_trim.m</a>
returns the length of a string to the last nonblank.
</li>
<li>
<a href = "timestamp.m">timestamp.m</a>
<b>TIMESTAMP</b> prints out the current YMDHMS date as a timestamp.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "asa144_test.m">asa144_test.m</a>, a sample problem.
</li>
<li>
<a href = "asa144_test01.m">asa144_test01.m</a>,
tests RCONT.
</li>
<li>
<a href = "asa144_test_output.txt">asa144_test_output.txt</a>,
the output 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 28 January 2008
</i>
<!-- John Burkardt -->
</body>
</html>