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<html><head><title>Add noise to data</title></head><body bgcolor="#ffffff"><h3>Add Gaussian / uniform white noise</h3><font color=blue><tt>addnoise <font color=red>[-r# | -v#]</font> [-u -0 -o </tt><em>outfile</em><tt> -l# -x# -c# -V# -h] </tt><em> file(s)</em></font><blockquote> <br> <font color=red><tt> -r </tt></font>absolute noise level <br> <font color=red><tt> -v </tt></font>same as fraction of standard deviation <br> <font color=blue><tt> -u </tt></font>add uniform noise (default Gaussian) <br> <font color=blue><tt> -0 </tt></font>do not read input, just issue random numbers <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>_noisy</tt></font> <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>Adds Gaussian noise of rms amplitude given by <font color=blue><tt>-r</tt></font> to data in<font color=blue><em>file(s)</em></font>. The amplitude can also be given (<font color=blue><tt>-v</tt></font>) as a fraction ofthe rms amplitude of the data. With <font color=blue><tt>-u</tt></font>, uniform noise in [0:<font color=blue><tt>#</tt></font>] is added,<font color=blue><tt>#</tt></font> given by <font color=blue><tt>-r</tt></font> or <font color=blue><tt>-v</tt></font>. Either <font color=blue><tt>-r</tt></font> or <font color=blue><tt>-v</tt></font> must be present. Outputfile <font color=blue><em>file</em><tt>_noisy</tt></font>. <p>If <font color=blue><tt>-0</tt></font> is given, no input files areread. Instead, <font color=blue><tt> -l </tt></font> random numbersof magnitude <font color=blue><tt> -r </tt></font> are produced.<hr>See also <a href="../docs_c/makenoise.html">makenoise</a> which uses adifferent random umber generator. <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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