operations
	Rmath
	plyr

see also
	https://metacpan.org/pod/PDL::Dims
	https://github.com/yuki-kimoto/Rstats
	https://metacpan.org/pod/Data::Table
	https://metacpan.org/pod/TableData::Object

work with
	https://metacpan.org/pod/PDL::IO::CSV
	https://metacpan.org/pod/PDL::IO::DBI
