[Ns-bugs] [Bug 181] Normal Variable Infinite Value & Bounds

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http://www.nsnam.org/bugzilla/show_bug.cgi?id=181





------- Comment #5 from raj.b at gatech.edu  2008-06-06 14:36 -------
Created an attachment (id=157)
 --> (http://www.nsnam.org/bugzilla/attachment.cgi?id=157&action=view)
test case for above patch

This is a test case which generates both unbounded and bounded versions of a
Normal(10,2).  Histogram plots verify that it works at bounding the
distribution symmetrically about the mean.  The tail of the bounded
distribution is skewed however:
http://www.prism.gatech.edu/~gtg037s/files/normal-variable.eps

This is due to the way the code is forcing values outside of the range to be on
the range boundary.  Ideally, the code would drop values outside of the range
and "try again" so that the boundary didn't have this behavrior.

Honestly though, this API was never intended to do this.  I conceived that the
bound would be set somewhere like 5 standard deviations away, so that this tail
effect is minimized.  What do people think?


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