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<html><head><title>Simple nonlinear noise reduction</title></head><body bgcolor="#ffffff"><h3>Simple nonlinear noise reduction</h3><font color=blue><tt>lazy <font color=red>-m# [-r# | -v#]</font> [-i# -o </tt><em>outfile</em><tt> -l# -x# -c# -V# -h] </tt><em> file</em></font><blockquote> <br> <font color=red><tt> -m </tt></font>embedding dimension <br> <font color=red><tt> -r </tt></font>absolut radius of neighbourhoods <br> <font color=red><tt> -v </tt></font>same as fraction of standard deviation <br> <font color=blue><tt> -i </tt></font>number of iterations (1) <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>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>output file name</a>, just <font color=blue><tt> -o </tt></font>means <font color=blue><em>file</em></font><font color=blue><tt>_lc</tt></font>, <font color=blue><em>file</em></font><font color=blue><tt>_lcc</tt></font> (etc.) <br> <font color=blue><tt> -V </tt></font><a href=../general.html#verbosity>verbosity level</a> (0 = only fatal errors) <br> <font color=blue><tt> -h </tt></font>show this message</blockquote>Performs nonlinear noise reduction with <a href="../chaospaper/node23.html">locally constant approximations</a>.Either <font color=blue><tt>-r</tt></font> or <font color=blue><tt>-v</tt></font> must be present. Output file (the cleaned sequence) is<font color=blue><em>file</em><tt>_lc[ccc]</tt></font> (one letter <font color=blue><tt>c</tt></font> per iteration).<p>This routine is based on<blockquote> T. Schreiber, <br> <em>Extremely simple nonlinear noise reduction method</em>, <br> Phys. Rev. E <b>47</b>, 2401 (1993).</blockquote><p><font color=red><b>Note:</b></font> With already fairly clean data, you canexpect superior results using <a href="project.html">project</a> or<a href="../docs_c/ghkss.html">ghkss</a>.<hr>See also <a href="../docs_c/nrlazy.html">nrlazy</a> which corrects more thanjust the central component. You may want to try both. <hr><h3>Usage example</h3>Try also just running: <font color=blue><tt>gnuplot lazy.gnu</tt></font> in the<font color=blue><tt>examples</tt></font> directory.<p><pre>> <font color=blue><tt>henon -l10000 > data</tt></font>> <font color=blue><tt>addnoise -v0.02 data</tt></font>> <font color=blue><tt>lazy -m7 -v0.06 -i3 data_noisy</tt></font>gnuplot> <font color=blue><tt>plot '< cat data_noisy | delay'</tt></font>gnuplot> <font color=blue><tt>plot '< cat data_noisy_lccc | delay'</tt></font></pre><p><IMG SRC="addnoise.gif" alt="noisy data"> <IMG SRC="lazy.gif" alt="cleaned data"><p><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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