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<title>Statistical Distribution Explorer</title>
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<div>
<div><h2 class="title">
<a name="statistical_distribution_explorer"></a>Statistical Distribution Explorer</h2></div>
<div><div class="authorgroup">
<div class="author"><h3 class="author">
<span class="firstname">Paul A.</span> <span class="surname">Bristow</span>
</h3></div>
<div class="author"><h3 class="author">
<span class="firstname">John</span> <span class="surname">Maddock</span>
</h3></div>
</div></div>
<div><p class="copyright">Copyright © 2008 Paul A. Bristow, John Maddock</p></div>
<div><div class="legalnotice">
<a name="id759711"></a><p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div></div>
</div>
<hr>
</div>
<p>
A Windows utility to show the properties of statistical distributions using parameters
provided interactively by the user.
</p>
<p>
The distributions provided are:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
bernoulli
</li>
<li class="listitem">
beta_distribution
</li>
<li class="listitem">
binomial_distribution
</li>
<li class="listitem">
cauchy
</li>
<li class="listitem">
chi_squared
</li>
<li class="listitem">
exponential
</li>
<li class="listitem">
extreme_value
</li>
<li class="listitem">
fisher_f
</li>
<li class="listitem">
gamma_distribution
</li>
<li class="listitem">
lognormal_distribution
</li>
<li class="listitem">
negative_binomial_distribution
</li>
<li class="listitem">
normal_distribution
</li>
<li class="listitem">
pareto
</li>
<li class="listitem">
poisson
</li>
<li class="listitem">
rayleigh
</li>
<li class="listitem">
students_t
</li>
<li class="listitem">
triangular
</li>
<li class="listitem">
uniform
</li>
<li class="listitem">
weibull
</li>
</ul></div>
<p>
Properties of distributions computed are:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
mean
</li>
<li class="listitem">
mode
</li>
<li class="listitem">
median
</li>
<li class="listitem">
variance
</li>
<li class="listitem">
standard deviation
</li>
<li class="listitem">
coefficient of variation,
</li>
<li class="listitem">
skewness
</li>
<li class="listitem">
kurtosis
</li>
<li class="listitem">
excess
</li>
<li class="listitem">
range supported
</li>
</ul></div>
<p>
Calculated, from values provided, are:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
probability density (or mass) function (PDF)
</li>
<li class="listitem">
cumulative distribution function (CDF), and complement
</li>
<li class="listitem">
Quantiles (percentiles) are calculated for typical risk (alpha) probabilities
(0.001, 0.01, 0.5, 0.1, 0.333) and for additional probabilities provided
by the user.
</li>
</ul></div>
<p>
Results can be saved to text files using Save or SaveAs. All the values on the
four tabs are output to the file chosen, and are tab separated to assist input
to other programs, for example, spreadsheets or text editors.
</p>
<p>
Note: Excel (for example), only shows 10 decimal digits, by default: to display
the maximum possible precision (about 15 decimal digits), it is necessary to
format all cells to display this precision. Although unusually accurate, not
all values computed by Distexplorer will be as accurate as this. Values shown
as NaN cannot be calculated from the value(s) given, most commonly because the
value input is outside the range for the distribution.
</p>
<p>
For more information, including downloads, see
</p>
<p>
<a href="http://distexplorer.sourceforge.net/" target="_top">Distexplorer at Sourceforge</a>
</p>
<p>
This Microsoft Windows 32 package distribution.exe was generated from a C# program
and uses a boost_math.dll generated using the Boost.Math C++ source code from
the Boost.Math Toolkit, compiled in CLI mode, containing the underlying statistical
distribution classes and functions.
</p>
<p>
All source code is freely available for view and use under the <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">Boost
Open Source License</a>.
</p>
<p>
<a href="https://svn.boost.org/svn/boost/sandbox%5Cmath_toolkit%5Clibs%5Cmath%5Cdot_net_example" target="_top">Math
Toolkit C++ source code</a> to produce boost_math.dll is in the most recent
<a href="http://www.boost.org" target="_top">Boost</a> release, initially 1.35.0.
</p>
<p>
It is distributed as a single Windows Installer package Setupdistex.msi. Unzip
the distexplorer.zip to a temporary location of your choice and run setup.exe.
</p>
<p>
(Note that .NET framework 2.0 and VCredist are requirements for this program.
Most recent and updated Windows environments will already have these, but they
are quickly, easily and safely installed from the Microsoft site if required.)
</p>
<p>
(The package cannot be run on other platforms at present but it should be possible
to build an equivalent utility on any C/C++ platform if anyone would like to
undertake this task.)
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"><p><small>Last revised: July 01, 2010 at 21:45:23 GMT</small></p></td>
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