autocor.html

来自「an analysis software with souce code for」· HTML 代码 · 共 37 行

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<html> 
<head><title>Autocorrelation function</title></head>
<body bgcolor="#ffffff">
<h3>Autocorrelation function</h3>
<font color=blue><tt>autocor [-v -p -P -o </tt><em>outfile</em><tt> -l# -x# -c# -V# -h] </tt><em> file(s)</em>
</font>
<blockquote>
   <br>     <font color=blue><tt> -v  </tt></font>give unnormalised autocovariance
   <br>     <font color=blue><tt> -p  </tt></font>assume periodic continuation
   <br>     <font color=blue><tt> -P  </tt></font>assume periodic continuation exactly
   <br>     <font color=blue><tt> -l  </tt></font>number of values to be read (all)
   <br>     <font color=blue><tt> -x  </tt></font>number of values to be skipped (0)
   <br>     <font color=blue><tt> -c  </tt></font><a href="../general.html#column" tppabs="http://www.mpipks-dresden.mpg.de/~tisean/TISEAN_2.0/docs/general.html#column">column to be read</a> (1 or <font color=blue><em>file</em></font>,#)
   <br>     <font color=blue><tt> -o  </tt></font><a href="../general.html#outfile" tppabs="http://www.mpipks-dresden.mpg.de/~tisean/TISEAN_2.0/docs/general.html#outfile">output file name</a>, just <font color=blue><tt> -o  </tt></font>means <font color=blue><em>file</em></font><font color=blue><tt>_co</tt></font>
   <br>     <font color=blue><tt> -V  </tt></font><a href="../general.html#verbosity" tppabs="http://www.mpipks-dresden.mpg.de/~tisean/TISEAN_2.0/docs/general.html#verbosity">verbosity level</a> (0 = only fatal errors)
   <br>     <font color=blue><tt> -h  </tt></font>show this message
</blockquote>
Computes the autocorrelation (or with <font color=blue><tt>-v</tt></font> the
autocovariance) function of a time series. This routine uses the FFT for
convolution and should thus asymptotically be faster than <a
href="../dresden/corr.html" tppabs="http://www.mpipks-dresden.mpg.de/~tisean/TISEAN_2.0/docs/dresden/corr.html">corr</a>.

By default, zero padding is used, that is, no periodic continuation is assumed.
With the option <font color=blue><tt>-P</tt></font>, it is assumed that the
data is exactly one period of a periodic function. If the number of data points
is not factorisable with factors of 2,3, or 5, a slow Fourier transform would
have to be used. Therefore, with the option <font
color=blue><tt>-p</tt></font>, approximate periodicity can be imposed by
finding the largest part of the time series that <em>is</em> thus factorisable.
Output file <font color=blue><em>file</em><tt>_co</tt></font>.
<hr>
See also <a href="../dresden/corr.html" tppabs="http://www.mpipks-dresden.mpg.de/~tisean/TISEAN_2.0/docs/dresden/corr.html">corr</a>
<hr>
<a href="../contents.html" tppabs="http://www.mpipks-dresden.mpg.de/~tisean/TISEAN_2.0/docs/contents.html">Table of Contents</a> * <a href="../../index.html" tppabs="http://www.mpipks-dresden.mpg.de/~tisean/TISEAN_2.0/index.html" target="_top">TISEAN home</a>
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autocor.html - 源码说明

本页面展示了「an analysis software with souce code for the time series with methods based on the theory of nonline」中的 autocor.html 源码文件，采用 HTML 编程语言编写，共 37 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

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