Some machine learning algorithms implemented using the Perl Data Language (PDL). This code serves mainly educational purposes. It is also incomplete and buggy. Do not use it for production. You have been warned. For each program, the --help option gives usage information. Example datasets can be downloaded from http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/ License: GPL 3 or later stats: 1205 lines TODO - finish the implementations - implement (batch) subgradient descent - modularize - add tests - upload to CPAN - implement SVR