<?xml version="1.0" encoding="utf-8" ?> <!-- for emacs: -*- coding: utf-8 -*- -->
<!-- Apache may like this line in the file .htaccess: AddCharset utf-8 .html -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg-flat.dtd" >
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head><title>subtable -- extract a subtable from a table</title>
<link rel="stylesheet" type="text/css" href="../../../../Macaulay2/Style/doc.css"/>
</head>
<body>
<table class="buttons">
<tr>
<td><div><a href="_table.html">next</a> | <a href="_sort.html">previous</a> | <a href="_table.html">forward</a> | <a href="_sort.html">backward</a> | <a href="_lists_spand_spsequences.html">up</a> | <a href="index.html">top</a> | <a href="master.html">index</a> | <a href="toc.html">toc</a> | <a href="http://www.math.uiuc.edu/Macaulay2/">Macaulay2 web site</a></div>
</td>
</tr>
</table>
<div><a href="index.html" title="">Macaulay2Doc</a> > <a href="___The_sp__Macaulay2_splanguage.html" title="">The Macaulay2 language</a> > <a href="_lists_spand_spsequences.html" title="">lists and sequences</a> > <a href="_subtable.html" title="extract a subtable from a table">subtable</a></div>
<hr/>
<div><h1>subtable -- extract a subtable from a table</h1>
<div class="single"><h2>Description</h2>
<div><tt>subtable(u,v,m)</tt> -- yields the subtable of the table m obtained from the list u of row numbers and the list v of column numbers.<p/>
<table class="examples"><tr><td><pre>i1 : m = table(5,5,identity)
o1 = {{(0, 0), (0, 1), (0, 2), (0, 3), (0, 4)}, {(1, 0), (1, 1), (1, 2), (1,
------------------------------------------------------------------------
3), (1, 4)}, {(2, 0), (2, 1), (2, 2), (2, 3), (2, 4)}, {(3, 0), (3, 1),
------------------------------------------------------------------------
(3, 2), (3, 3), (3, 4)}, {(4, 0), (4, 1), (4, 2), (4, 3), (4, 4)}}
o1 : List</pre>
</td></tr>
<tr><td><pre>i2 : subtable({1,3,4},toList(2..4), m)
o2 = {{(1, 2), (1, 3), (1, 4)}, {(3, 2), (3, 3), (3, 4)}, {(4, 2), (4, 3),
------------------------------------------------------------------------
(4, 4)}}
o2 : List</pre>
</td></tr>
</table>
</div>
</div>
</div>
</body>
</html>
