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<html><head><title>sav_gol</title></head><body bgcolor=white><h1 align=center>Description of the program: <font color=Blue>sav_gol</font></h1><hr>This program performes a <ahref="../chaospaper/citation.html#numrec">Savitzky-Golay filter</a> toeither clean the data from high frequency noise or to get a betterestimate of the <font color=blue>D</font>th derivative. It it possibleto run it on multivariate data.<hr><h2 align=center>Usage:</h2><center><font color=Red>sav_gol [Options]</font><p>Everything not being a valid option will be interpreted as a potential datafile name. Given no datafile at all, means read stdin. Also <font color=Red>-</font> means stdin<p>Possible options are:<p><table border=2><tr><th>Option<th>Description<th>Default</tr><tr><th>-l#<td>number of data to use<td>whole file</tr><tr><th>-x#<td>number of lines to be ignored<td>0</tr><tr><th>-c#<td><a href=../general.html#column>columns to be read</a><td>1</tr><tr><th>-m#<td>no. of components to be read (dimension)<td>1</tr><tr><th>-n#,#<td>length of the averaging window back in time,<br>length of the averaging window forward in time<td>2,2</tr><tr><th>-p#<td>order of the fitted polynomial<td>2</tr><tr><th>-D#<td>order of the derivative to be estimated<td>0 (just filter)</tr><tr><th>-o#<td><a href=../general.html#outfile>output file name</a><br><td>without file name: 'datafile'.sg<br>(or stdin.sg if stdin was read)<br>If no -o option is given stdout is used</tr><tr><th>-V#<td><a href=../general.html#verbosity>verbosity level</a><br> 0: only panic messages<br> 1: add input/output messages<td>1</tr><tr><th>-h<td>show these options<td>none</tr></table></center><hr><h2 align=center>Description of the Output:</h2>The output file contains <font color=blue>l</font> lines, each ofwhich has <font color=blue>m</font> columns. It is the filtereddata. The first <font color=blue>length of the averaging window backin time</font> and the last <font color=blue>length of the averagingwindow forward in time</font> lines are special. They contain the rawdata in case that <font color=blue>D</font> was set to 0 and zeroes incase <font color=blue>D</font> was larger than zero. <hr>View the <a href="../../source_c/sav_gol.c"> C-sources</a>.<hr><a href=../contents.html>Table of Contents</a> * <a href="../../index.html" target="_top">TISEAN home</a></body></html>⌨️ 快捷键说明
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