[Rd] pari/gp interface

From: Robin Hankin <r.hankin_at_noc.soton.ac.uk>
Date: Tue 25 Jul 2006 - 09:08:32 GMT


Hi

I'm developing an R package that
needs to execute some code written in pari/gp.

I've used this before from an R package (elliptic) but the interface is very
basic: the R function creates a string such as the following:

string <- echo ' ellwp ([ 2+0*I , 0+2*I ], 1+0*I )' | gp -q

And then

system(string)

returns the output from gp which then needs to be text processed (translating "I"
to "i", etc).

I don't think this approach would work under Windows.

Does anyone have any experience of calling pari/gp from R?

Or any ideas for a more portable method than the one above?

[
PARI/GP is a widely used computer algebra system designed for fast computations
in number theory. It is freely available at

  http://pari.math.u-bordeaux.fr/
]

--
Robin Hankin
Uncertainty Analyst
National Oceanography Centre, Southampton
European Way, Southampton SO14 3ZH, UK
  tel  023-8059-7743

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