[Boost-bugs] [Boost C++ Libraries] #6151: Wrong output from boot::math, cdf(complement(laplace_distribuiton<>(...))

Subject: [Boost-bugs] [Boost C++ Libraries] #6151: Wrong output from boot::math, cdf(complement(laplace_distribuiton<>(...))
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-11-19 21:41:51

#6151: Wrong output from boot::math, cdf(complement(laplace_distribuiton<>(...))
---------------------------------------+------------------------------------
 Reporter:  Yan Zhou <zhouyan@…>       |       Owner:         
     Type:  Bugs                       |      Status:  new    
Milestone:  To Be Determined           |   Component:  None   
  Version:  Boost 1.48.0               |    Severity:  Problem
 Keywords:                             |  
---------------------------------------+------------------------------------
 To illustrate the bug, see the following code,


 {{{

 #include <boost/math/distributions/laplace.hpp>
 #include <iostream>

 int main ()
 {
     boost::math::laplace lap(1, 1);
     std::cout << boost::math::cdf(lap, 1) << std::endl;
     std::cout << boost::math::cdf(boost::math::complement(lap, 1)) <<
 std::endl;

     return 0;
 }
 }}}

 The output should be two numbers sum up to 1. Instead, it print

 0.5 (this is correct)
 0.0676676 (this is wrong)

 I have double read the boost::math documents, to make sure that I didn't
 misused the library. Hopefully I am not making a stupid mistake here.
 Otherwise, the bug looks so stupid to me that I still don't believe this
 is a bug in boost::math, instead I did something wrong here.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6151>
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