📄 addnoise.html
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<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" 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>_noisy</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>
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 of
the 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. Output
file <font color=blue><em>file</em><tt>_noisy</tt></font>.
<p>
If <font color=blue><tt>-0</tt></font> is given, no input files are
read. Instead, <font color=blue><tt> -l </tt></font> random numbers
of magnitude <font color=blue><tt> -r </tt></font> are produced.
<hr>
See also <a href="../dresden/makenoise.html" tppabs="http://www.mpipks-dresden.mpg.de/~tisean/TISEAN_2.0/docs/dresden/makenoise.html">makenoise</a> which uses a
different random umber generator.
<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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