note Anonymous Monk <P><I>Why can I download complete working office suites with one click, but CPAN is so complicated to use just to download some simple text? </i> <P>Because you're confused and cranky :) <P>The purpose of libraries and CPAN is to be re-used, not provide you with cut/paste implementations of algorithms on demand <P>You can find the formula in the wikipedia://[http://en.wikipedia.org/wiki/L%C3%A9vy_distribution|Lévy distribution] <P>Math::GSL is interface to libgsl, so you should look at libgsl sources <P>[http://www.google.com/codesearch#search/&q=gsl_ran_levy&type=cs] <P>[http://bzr.savannah.gnu.org/lh/gsl/trunk/annotate/head:/randist/levy.c] 929235 929235 10