<?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>numeric -- convert to floating point</title>
<link rel="stylesheet" type="text/css" href="../../../../Macaulay2/Style/doc.css"/>
</head>
<body>
<table class="buttons">
<tr>
<td><div><a href="_numgens.html">next</a> | <a href="_numerator.html">previous</a> | <a href="_numgens.html">forward</a> | <a href="_numerator.html">backward</a> | up | <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>
<hr/>
<div><h1>numeric -- convert to floating point</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>numeric x</tt><br/><tt>numeric(prec,x)</tt><br/><tt>numeric_prec x</tt></div>
</dd></dl>
</div>
</li>
<li><div class="single">Inputs:<ul><li><span><tt>x</tt></span></li>
<li><span><tt>prec</tt>, <span>an <a href="___Z__Z.html">integer</a></span>, the number of bits of precision to use in the computation</span></li>
</ul>
</div>
</li>
<li><div class="single">Outputs:<ul><li><span>the expression obtained from <tt>x</tt> by converting the integers, rational numbers, and symbolic constants within it to double floating point numbers.</span></li>
</ul>
</div>
</li>
</ul>
</div>
<div class="single"><h2>Description</h2>
<div><table class="examples"><tr><td><pre>i1 : x = {1,2/3,pi}
2
o1 = {1, -, pi}
3
o1 : List</pre>
</td></tr>
<tr><td><pre>i2 : numeric oo
o2 = {1, .666667, 3.14159}
o2 : List</pre>
</td></tr>
<tr><td><pre>i3 : numeric_200 pi
o3 = 3.14159265358979323846264338327950288419716939937510582097494
o3 : RR (of precision 200)</pre>
</td></tr>
<tr><td><pre>i4 : numeric_100 oo
o4 = 3.14159265358979323846264338328
o4 : RR (of precision 100)</pre>
</td></tr>
</table>
</div>
</div>
<div class="single"><h2>See also</h2>
<ul><li><span><a href="___R__R.html" title="the class of all real numbers">RR</a> -- the class of all real numbers</span></li>
<li><span><a href="___C__C.html" title="the class of all complex numbers">CC</a> -- the class of all complex numbers</span></li>
<li><span><a href="___Constant.html" title="">Constant</a></span></li>
</ul>
</div>
<div class="waystouse"><h2>Ways to use <tt>numeric</tt> :</h2>
<ul><li>numeric(CC)</li>
<li>numeric(Constant)</li>
<li>numeric(InfiniteNumber)</li>
<li>numeric(Matrix)</li>
<li>numeric(Number)</li>
<li>numeric(RR)</li>
<li>numeric(VisibleList)</li>
<li>numeric(ZZ,CC)</li>
<li>numeric(ZZ,Constant)</li>
<li>numeric(ZZ,InfiniteNumber)</li>
<li>numeric(ZZ,Matrix)</li>
<li>numeric(ZZ,Number)</li>
<li>numeric(ZZ,VisibleList)</li>
</ul>
</div>
</div>
</body>
</html>
