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111 lines
5.2 KiB
HTML
111 lines
5.2 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This manual is for GNU MPC, a library for multiple precision complex arithmetic,
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version 1.0.3 of February 2015.
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Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 INRIA
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with no
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Invariant Sections. A copy of the license is included in the section
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entitled "GNU Free Documentation License." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Projection & Decomposing (GNU MPC 1.0.3)</title>
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<meta name="description" content="Projection & Decomposing (GNU MPC 1.0.3)">
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<meta name="keywords" content="Projection & Decomposing (GNU MPC 1.0.3)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="Complex-Functions.html#Complex-Functions" rel="up" title="Complex Functions">
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<link href="Basic-Arithmetic.html#Basic-Arithmetic" rel="next" title="Basic Arithmetic">
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<link href="Complex-Comparison.html#Complex-Comparison" rel="prev" title="Complex Comparison">
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<style type="text/css">
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Projection-_0026-Decomposing"></a>
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<div class="header">
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<p>
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Next: <a href="Basic-Arithmetic.html#Basic-Arithmetic" accesskey="n" rel="next">Basic Arithmetic</a>, Previous: <a href="Complex-Comparison.html#Complex-Comparison" accesskey="p" rel="prev">Complex Comparison</a>, Up: <a href="Complex-Functions.html#Complex-Functions" accesskey="u" rel="up">Complex Functions</a> [<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Projection-and-Decomposing-Functions"></a>
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<h3 class="section">5.6 Projection and Decomposing Functions</h3>
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<a name="index-Projection-and-Decomposing-Functions"></a>
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<dl>
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<dt><a name="index-mpc_005freal"></a>Function: <em>int</em> <strong>mpc_real</strong> <em>(mpfr_t <var>rop</var>, mpc_t <var>op</var>, mpfr_rnd_t <var>rnd</var>)</em></dt>
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<dd><p>Set <var>rop</var> to the value of the real part of <var>op</var> rounded
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in the direction <var>rnd</var>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-mpc_005fimag"></a>Function: <em>int</em> <strong>mpc_imag</strong> <em>(mpfr_t <var>rop</var>, mpc_t <var>op</var>, mpfr_rnd_t <var>rnd</var>)</em></dt>
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<dd><p>Set <var>rop</var> to the value of the imaginary part of <var>op</var> rounded in the
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direction <var>rnd</var>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-mpc_005frealref"></a>Macro: <em>mpfr_t</em> <strong>mpc_realref</strong> <em>(mpc_t <var>op</var>)</em></dt>
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<dt><a name="index-mpc_005fimagref"></a>Macro: <em>mpfr_t</em> <strong>mpc_imagref</strong> <em>(mpc_t <var>op</var>)</em></dt>
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<dd><p>Return a reference to the real part and imaginary part of <var>op</var>,
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respectively. The <code>mpfr</code> functions can be used on the result of these
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macros (note that the <code>mpfr_t</code> type is itself a pointer).
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</p></dd></dl>
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<dl>
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<dt><a name="index-mpc_005farg"></a>Function: <em>int</em> <strong>mpc_arg</strong> <em>(mpfr_t <var>rop</var>, mpc_t <var>op</var>, mpfr_rnd_t <var>rnd</var>)</em></dt>
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<dd><p>Set <var>rop</var> to the argument of <var>op</var>, with a branch cut along the
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negative real axis.
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</p></dd></dl>
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<dl>
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<dt><a name="index-mpc_005fproj"></a>Function: <em>int</em> <strong>mpc_proj</strong> <em>(mpc_t <var>rop</var>, mpc_t <var>op</var>, mpc_rnd_t <var>rnd</var>)</em></dt>
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<dd><p>Compute a projection of <var>op</var> onto the Riemann sphere. Set <var>rop</var> to
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<var>op</var> rounded in the direction <var>rnd</var>, except when at least one part of
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<var>op</var> is infinite (even if the other part is a NaN) in which case the real
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part of <var>rop</var> is set to plus infinity and its imaginary part to a signed
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zero with the same sign as the imaginary part of <var>op</var>.
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</p></dd></dl>
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</body>
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</html>
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