[R] R as programming language: references?

[Federico Calboli]

Hi All,

I am looking for references on R as a programming language (apart form
the standard R-lang.pdf and the other manuals), reference that would
cover _in_depth_ things like loops, code optimisation, debugging tools
etc... and is as up-to-date as possible. 

Can anyone suggest any book or other reference apart from the "green
book" and the V&R "S-programming"?

Cheers,

Federico Calboli

-- 
Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St Mary's Campus
Norfolk Place, London W2 1PG

Tel  +44 (0)20 7594 1602     Fax (+44) 020 7594 3193

f.calboli [.a.t] imperial.ac.uk
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