
This is to announce that Ryacas has moved to the CRAN
(from the Omegahat) repository.

Also a new version of Ryacas is being released: Ryacas 0.2-4.

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A partial lists of changes is shown here:

o Ryacas 0.2-4 will use yacas 1.0.62 on all platforms.
  (It previously used yacas 1.0.61 on Windows and yacas 1.0.62 
  on other platforms.)

o The binary files 'yacas.exe' and 'scripts.dat' for Windows are 
  no longer included in Ryacas. Instead, a new installation procedure
  has been developed for Windows users only to install both
  Ryacas and yacas:

	install.packages("Ryacas, dep = TRUE)
	library(Ryacas)
	yacasInstall()
 
  On other platforms, as before, its up to the user to separately 
  install yacas 1.0.62 .

o on all platforms yacas now shuts down gracefully when the user 
  detaches Ryacas:

  	detach()

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More information is on the Ryacas home page at:

   http://code.google.com/p/ryacas/

---

WHAT IS RYACAS?

Ryacas allows R users to access the yacas computer
algebra system (CAS) from R.

Ryacas can be used for exact arithmetic, symbolic
math, ASCII pretty printing and translating R to
TeX. 

Ryacas contains 8 different R interfaces to yacas.
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.


MORE INFO

For overview, pointers to additional information,
installation instructions and a sample session
see the R home page at:

    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

Once Ryacas is installed, pointers to additional
information can be found with these R commands:

    library(Ryacas)
    package?Ryacas

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Rob Goedman, goedman at mac dot com
Gabor Grothendieck, ggrothendieck at gmail dot com
Sren Hjsgaard, Soren.Hojsgaard at agrsci dot dk
Ayal Pinkus, apinkus at xs4all dot nl

