Sophie: octave-doc-0:5.1.0-7.1.mga7 noarch

octave-doc-5.1.0-7.1.mga7.noarch.rpm

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Commands (GNU Octave (version 5.1.0))</title>

<meta name="description" content="Commands (GNU Octave (version 5.1.0))">
<meta name="keywords" content="Commands (GNU Octave (version 5.1.0))">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html#Top" rel="start" title="Top">
<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Functions-and-Scripts.html#Functions-and-Scripts" rel="up" title="Functions and Scripts">
<link href="Organization-of-Functions.html#Organization-of-Functions" rel="next" title="Organization of Functions">
<link href="Inline-Functions.html#Inline-Functions" rel="prev" title="Inline Functions">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smalllisp {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}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
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">
<a name="Commands"></a>
<div class="header">
<p>
Next: <a href="Organization-of-Functions.html#Organization-of-Functions" accesskey="n" rel="next">Organization of Functions</a>, Previous: <a href="Function-Handles-Anonymous-Functions-Inline-Functions.html#Function-Handles-Anonymous-Functions-Inline-Functions" accesskey="p" rel="prev">Function Handles Anonymous Functions Inline Functions</a>, Up: <a href="Functions-and-Scripts.html#Functions-and-Scripts" accesskey="u" rel="up">Functions and Scripts</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Commands-1"></a>
<h3 class="section">11.12 Commands</h3>

<p>Commands are a special class of functions that only accept string
input arguments.  A command can be called as an ordinary function, but
it can also be called without the parentheses.  For example,
</p>
<div class="example">
<pre class="example">my_command hello world
</pre></div>

<p>is equivalent to
</p>
<div class="example">
<pre class="example">my_command (&quot;hello&quot;, &quot;world&quot;)
</pre></div>

<p>The general form of a command call is
</p>
<div class="example">
<pre class="example"><var>cmdname</var> <var>arg1</var> <var>arg2</var> &hellip;
</pre></div>

<p>which translates directly to
</p>
<div class="example">
<pre class="example"><var>cmdname</var> (&quot;<var>arg1</var>&quot;, &quot;<var>arg2</var>&quot;, &hellip;)
</pre></div>

<p>Any regular function can be used as a command if it accepts string input
arguments.  For example:
</p>
<div class="example">
<pre class="example">toupper lower_case_arg
   &rArr; ans = LOWER_CASE_ARG
</pre></div>

<p>One difficulty of commands occurs when one of the string input arguments
is stored in a variable.  Because Octave can&rsquo;t tell the difference between
a variable name and an ordinary string, it is not possible to pass a
variable as input to a command.  In such a situation a command must be
called as a function.  For example:
</p>
<div class="example">
<pre class="example">strvar = &quot;hello world&quot;;
toupper strvar
   &rArr; ans = STRVAR
toupper (strvar)
   &rArr; ans = HELLO WORLD
</pre></div>





</body>
</html>