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<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* This help file was generated from chirp.sci using help_from_sci().
*
-->
<refentry version="5.0-subset Scilab" xml:id="chirp" xml:lang="en"
xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns:ns3="http://www.w3.org/1999/xhtml"
xmlns:mml="http://www.w3.org/1998/Math/MathML"
xmlns:scilab="http://www.scilab.org"
xmlns:db="http://docbook.org/ns/docbook">
<refnamediv>
<refname>chirp</refname>
<refpurpose>This function evaluates a chirp signal at time t.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>
y = chirp(t)
y = chirp(t, f0)
y = chirp(t, f0, t1)
y = chirp(t, f0, t1, f1)
y = chirp(t, f0, t1, f1, frm)
y = chirp(t, f0, t1, f1, frm, phse)
</synopsis>
</refsynopsisdiv>
<refsection>
<title>Parameters</title>
<variablelist>
<varlistentry><term>t:</term>
<listitem><para> vector</para></listitem></varlistentry>
<varlistentry><term>f0:</term>
<listitem><para> </para></listitem></varlistentry>
<varlistentry><term>t1:</term>
<listitem><para> </para></listitem></varlistentry>
<varlistentry><term>f1:</term>
<listitem><para> </para></listitem></varlistentry>
<varlistentry><term>frm:</term>
<listitem><para> string value, takes in "linear", "quadratic", "logarithmic"</para></listitem></varlistentry>
<varlistentry><term>phse:</term>
<listitem><para> </para></listitem></varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>
This is an Octave function.
This function evaluates a chirp signal at time t. A chirp signal is a frequency swept cosine wave.
The first argument is a vector of times to evaluate the chirp signal, second argument is the frequency at t=0, third argument is time t1 and fourth argument is frequency at t1.
The fifth argument is the form which takes in values "linear", "quadratic" and "logarithmic", the sixth argument gives the phase shift at t=0.
</para>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
chirp([4,3,2,1],4,5,0.9)
ans =
column 1 to 3
0.9685832 0.2486899 0.0627905
column 4
- 0.3681246
]]></programlisting>
</refsection>
</refentry>
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