This is Perl module Algorithm::DimReduction. INSTALLATION Algorithm::DimReduction installation is straightforward. If your CPAN shell is set up, you should just be able to do % cpan Algorithm::DimReduction Download it, unpack it, then build it as per the usual: % perl Makefile.PL % make && make test Then install it: % make install DOCUMENTATION Algorithm::DimReduction documentation is available as in POD. So you can do: % perldoc Algorithm::DimReduction to read the documentation online with your favorite pager. Takeshi Miki