poisson distribution function
poisson distribution function

git-svn-id: https://beagle.whoi.edu/svn/ifcb/trunk@1042 9f5e5bc8-6430-4f94-ad00-aad15e9f9366

Former-commit-id: e6abd76e6de4c97b6575ebe09f93d13d5f5d5549
hsosik/ifcb-analysis,hsosik/ifcb-analysis,hsosik/ifcb-analysis,hsosik/ifcb-analysis,hsosik/ifcb-analysis