<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>tablei</title>
<link rel="stylesheet" href="csound.css" type="text/css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
<link rel="prev" href="tablegpw.html" title="tablegpw" />
<link rel="next" href="tableicopy.html" title="tableicopy" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">tablei</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="tablegpw.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="tableicopy.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry" title="tablei">
<a id="tablei"></a>
<div class="titlepage"></div>
<a id="IndexTablei" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">tablei</span>
</h2>
<p>tablei —
Accesses table values by direct indexing with linear interpolation.
</p>
</div>
<div class="refsect1" title="Description">
<a id="id3269920"></a>
<h2>Description</h2>
<p>
Accesses table values by direct indexing with linear interpolation.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="id3269939"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>tablei</strong></span> andx, ifn [, ixmode] [, ixoff] [, iwrap]</pre>
<pre class="synopsis">ires <span class="command"><strong>tablei</strong></span> indx, ifn [, ixmode] [, ixoff] [, iwrap]</pre>
<pre class="synopsis">kres <span class="command"><strong>tablei</strong></span> kndx, ifn [, ixmode] [, ixoff] [, iwrap]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="id3269983"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifn</em></span> -- function table number. <span class="emphasis"><em>tablei</em></span> requires the extended guard point.
</p>
<p>
<span class="emphasis"><em>ixmode</em></span> (optional) -- index data mode. The default value is 0.
</p>
<div class="itemizedlist">
<ul class="itemizedlist" type="disc">
<li class="listitem">
<p>0 = raw index</p>
</li>
<li class="listitem">
<p>1 = normalized (0 to 1)</p>
</li>
</ul>
</div>
<p>
</p>
<p>
<span class="emphasis"><em>ixoff</em></span> (optional) -- amount by which index is to be offset. For a table with origin at center, use tablesize/2 (raw) or .5 (normalized). The default value is 0.
</p>
<p>
<span class="emphasis"><em>iwrap</em></span> (optional) -- wraparound index flag. The default value is 0.
</p>
<div class="itemizedlist">
<ul class="itemizedlist" type="disc">
<li class="listitem">
<p>0 = nowrap (index < 0 treated as index=0; index > tablesize sticks at index=size)</p>
</li>
<li class="listitem">
<p>1 = wraparound.</p>
</li>
</ul>
</div>
<p>
</p>
</div>
<div class="refsect1" title="Performance">
<a id="id3270984"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>tablei</em></span> is a interpolating unit in which the fractional part of index is used to interpolate between adjacent table entries. The smoothness gained by interpolation is at some small cost in execution time (see also <a class="link" href="oscili.html" title="oscili"><em class="citetitle">oscili</em></a>, etc.), but the interpolating and non-interpolating units are otherwise interchangeable. Note that when <span class="emphasis"><em>tablei</em></span> uses a periodic index whose modulo <span class="emphasis"><em>n</em></span> is less than the power of 2 table length, the interpolation process requires that there be an (<span class="emphasis"><em>n</em></span> + 1)th table value that is a repeat of the 1st (see <a class="link" href="f.html" title="f Statement (or Function Table Statement)"><em class="citetitle">f Statement</em></a> in score).
</p>
</div>
<div class="refsect1" title="See Also">
<a id="id3271032"></a>
<h2>See Also</h2>
<p>
<a class="link" href="table.html" title="table"><em class="citetitle">table</em></a>,
<a class="link" href="table3.html" title="table3"><em class="citetitle">table3</em></a>,
<a class="link" href="oscil1.html" title="oscil1"><em class="citetitle">oscil1</em></a>,
<a class="link" href="oscil1i.html" title="oscil1i"><em class="citetitle">oscil1i</em></a>,
<a class="link" href="osciln.html" title="osciln"><em class="citetitle">osciln</em></a>
</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="tablegpw.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="OpcodesTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="tableicopy.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">tablegpw </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> tableicopy</td>
</tr>
</table>
</div>
</body>
</html>
