Re: [R] [R-pkgs] New package Ryacas

From: Cleber N. Borges <cborges_at_iqm.unicamp.br>
Date: Mon 16 Oct 2006 - 19:51:49 GMT

Hello,

First,
I would like to congratulations for very cool package! It's very nice

idea!...
Secondly,
Is there a way to send R'objects (variables) to yacas and make symbolic
operations??
for example:

d <- diag(3)
a <- "A"

yacas( d * a )

Thanks,
Cleber Borges

Gabor Grothendieck wrote:

>Ryacas is an R interface to the free yacas computer algebra
>system. Ryacas allows one to send R expressions,
>unprocessed yacas strings and certain other R objects to a
>separate yacas process from R and get back the result. It
>also has facilities for manipulating yacas strings and R
>expressions destined for yacas processing.
>
>It can be used for exact arithmetic, symbolic math, ASCII
>pretty printing and translating R to TeX.
>
>
>Online info. For overview, pointers to additional
>information, installation instructions and a sample session
>see:
>
> http://code.google.com/p/ryacas/
>
>The vignettes can be viewed online here:
>
> http://ryacas.googlecode.com/svn/trunk/inst/doc/Ryacas.pdf
> http://ryacas.googlecode.com/svn/trunk/inst/doc/Ryacas-Sym.pdf
>
>
>More. Once Ryacas is installed, pointers to additional
>information can be found with these R commands:
>
> library(Ryacas)
> package?Ryacas
>
>
>---
>
>



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