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<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* This help file was generated from alignsignals.sci using help_from_sci().
*
-->
<refentry version="5.0-subset Scilab" xml:id="alignsignals" 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>alignsignals</refname>
<refpurpose>This function aligns the two input signals.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Syntax</title>
<synopsis>
[Xa Ya] = ALIGNSIGNALS(X,Y)
[Xa Ya] = ALIGNSIGNALS(X,Y,MAXLAG)
[Xa Ya] = ALIGNSIGNALS(X,Y,MAXLAG,1)
[Xa Ya D] = ALIGNSIGNALS(...)
</synopsis>
</refsynopsisdiv>
<refsection>
<title>Description</title>
<para>
[Xa Ya] = ALIGNSIGNALS(X,Y) aligns the two vectors X and Y by estimating
the delay D between the two. If Y is delayed with respect to X, D is
positive , and X is delayed by D samples. If Y is advanced with respect
to X, D is negative, and Y is delayed by -D samples.
</para>
<para>
[Xa Ya] = ALIGNSIGNALS(X,Y,MAXLAG) considers MAXLAG be the maximum correlation
window size which is used to calculate the estimated delay D between X and Y.
MAXLAG is an integer-valued scalar. By default, MAXLAG is equal to MAX(LX,LY)-1.
If MAXLAG is empty ([]),then default value is considered. If MAXLAG
is negative, it is replaced by its absolute value.
</para>
<para>
[Xa Ya] = ALIGNSIGNALS(X,Y,MAXLAG,1) keeps the lengths of Xa
and Ya the same as those of X and Y, respectively.
Here, 1 implies truncation of the intermediate vectors.
Input argument 4 is 0 implies truncation_off (no truncation).
D is positive implies D zeros are pre-pended to X, and the last D samples of X are truncated.
D is negative implies -D zeros are pre-pended to Y, and the last -D samples
of Y are truncated. That means, when D>=Length(X), all samples of X are lost.
Similarly, when -D>=Length(Y), all samples of Y are lost.
Avoid assigning a specific value to MAXLAG when using the truncate=1 option, set MAXLAG to [].
</para>
<para>
[Xa Ya D] = ALIGNSIGNALS(...) returns the estimated delay D.
</para>
<para>
</para>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
X = [0 0 0 1 2 3 ];
Y = [1 2 3 ];
[Xa,Ya] = alignsignals(X,Y,[],1)
]]></programlisting>
</refsection>
<refsection>
<title>Authors</title>
<simplelist type="vert">
<member>Pola Lakshmi Priyanka, IIT Bombay</member>
</simplelist>
</refsection>
</refentry>
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