Are there any interrupted streaming statistics libraries for Perl Γ la: http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#On-line_algorithm
I haven't found anything in CPAN yet, and I really don't want him to write code.
You want Statistics :: Descriptive . The usual "sparse" version of the module (not Statistics::Descriptive::Full ) provides statistics that are available without storing the entire data set; variance is one of them.
Statistics::Descriptive::Full
You can use the RSPerl module, which interacts with the R statistics package.