M. Edward (Ed) Borasky wrote:
> GSL doesn't have SVD, least-squares and eigenvalues?

IIRC GSL has these things (and BLAS and LAPACK), but it lacks others, 
such as NArray's convenient matrix slice-and-dice syntax.  RSRuby has 
lots of great statistical routines, but probably can't share data with 
NArray or GSL.  Each solves its own part of the problem well, but 
someone still needs to sit down and write efficient (non-copying) and 
transparent glue between them.  A Matlab transition cheat-sheet would 
also help (Numpy has one of these).
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