id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
10111,quantile at p=1 for non-central chi-squared---regression bug?,HS <tan@…>,John Maddock,"I think this used to work as expected a while ago:

{{{
#include <cstdlib>
#include <cstdio>

#include <boost/math/distributions/non_central_chi_squared.hpp>
#include <boost/math/distributions/chi_squared.hpp>

int main()
{
   const double _df = 1.2;
   const double _nc = 2.5;

   const double _p = 1.0;

   std::printf(
         ""\nchi-squared: quantile( p=%g, df=%g ) = %g\n"",
         _p, _df,
         boost::math::quantile(
            boost::math::chi_squared_distribution<>( _df ),
            _p ) );

   std::printf(
         ""non-central chi-squared: quantile( p=%g, df=%g, nc=%g ) = %g\n\n"",
         _p, _df, _nc,
         boost::math::quantile(
            boost::math::non_central_chi_squared_distribution<>( _df, _nc ),
            _p ) );

   return EXIT_SUCCESS;
}
}}}

When built with ""g++ -o test chisq.cpp"" (after saving the above as ""chisq.cpp"") on a Linux box, this currently returns

{{{
chi-squared: quantile( p=1, df=1.2 ) = inf
non-central chi-squared: quantile( p=1, df=1.2, nc=2.5 ) = 1.79769e+308
}}}

when ran; I expected both to return inf.

Thank you,[[br]]
HS",Bugs,closed,To Be Determined,math,Boost Development Trunk,Regression,fixed,,