1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Created by GNU Texinfo 6.7, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Data Types (GNU Octave (version 6.2.0))</title>
<meta name="description" content="Data Types (GNU Octave (version 6.2.0))">
<meta name="keywords" content="Data Types (GNU Octave (version 6.2.0))">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html" rel="start" title="Top">
<link href="Concept-Index.html" rel="index" title="Concept Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="index.html" rel="up" title="Top">
<link href="Built_002din-Data-Types.html" rel="next" title="Built-in Data Types">
<link href="Comments-and-the-Help-System.html" rel="prev" title="Comments and the Help System">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>
<link rel="stylesheet" type="text/css" href="octave.css">
</head>
<body lang="en">
<span id="Data-Types"></span><div class="header">
<p>
Next: <a href="Numeric-Data-Types.html" accesskey="n" rel="next">Numeric Data Types</a>, Previous: <a href="Getting-Started.html" accesskey="p" rel="prev">Getting Started</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<span id="Data-Types-1"></span><h2 class="chapter">3 Data Types</h2>
<span id="index-data-types"></span>
<p>All versions of Octave include a number of built-in data types,
including real and complex scalars and matrices, character strings,
a data structure type, and an array that can contain all data types.
</p>
<p>It is also possible to define new specialized data types by writing a
small amount of C++ code. On some systems, new data types can be loaded
dynamically while Octave is running, so it is not necessary to recompile
all of Octave just to add a new type. See <a href="External-Code-Interface.html">External Code Interface</a>, for
more information about Octave’s dynamic linking capabilities.
<a href="User_002ddefined-Data-Types.html">User-defined Data Types</a> describes what you must do to define a
new data type for Octave.
</p>
<span id="XREFtypeinfo"></span><dl>
<dt id="index-typeinfo">: <em></em> <strong>typeinfo</strong> <em>()</em></dt>
<dt id="index-typeinfo-1">: <em></em> <strong>typeinfo</strong> <em>(<var>expr</var>)</em></dt>
<dd>
<p>Return the type of the expression <var>expr</var>, as a string.
</p>
<p>If <var>expr</var> is omitted, return a cell array of strings containing all the
currently installed data types.
</p>
<p><strong>See also:</strong> <a href="Built_002din-Data-Types.html#XREFclass">class</a>, <a href="Built_002din-Data-Types.html#XREFisa">isa</a>.
</p></dd></dl>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">• <a href="Built_002din-Data-Types.html" accesskey="1">Built-in Data Types</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="User_002ddefined-Data-Types.html" accesskey="2">User-defined Data Types</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">• <a href="Object-Sizes.html" accesskey="3">Object Sizes</a></td><td> </td><td align="left" valign="top">
</td></tr>
</table>
</body>
</html>
|
