Boost C++ Libraries: Ticket #3451: Poisson generator not mentioned in documentation

ts337@… — Wed, 18 Nov 2009 17:21:42 GMT

As far as I can tell, the following lines of code should work, but don't:

boost::mt19937 rng(3u); boost::poisson_distribution<> po_dist(0.7); cout <<"Po var: " << po_dist(rng)<<endl;

As far as I can tell, poisson_distribution::operator()(Engine& eng) results in an infinite loop.

So should probably be fixed before documenting?

Steven Watanabe — Fri, 05 Mar 2010 19:33:01 GMT

The poisson distribution takes a random number engine that produces values in the range [0, 1). You need to use variate_generator.

#include <boost/random.hpp>
#include <iostream>
int main() {
    boost::mt19937 rng(3u);
    boost::variate_generator<boost::mt19937&, boost::poisson_distribution<> >
        po_dist(rng, boost::poisson_distribution<>(0.7));
    std::cout << "Po var: " << po_dist() << std::endl;
}

status changed; resolution set

Steven Watanabe — Fri, 26 Mar 2010 23:10:12 GMT

status new → closed
resolution → fixed

The Poisson distribution is now documented.