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 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.
To build and install from github using R 3.3.0 (or later) and the R devtools package 1.11.0 (or later) run this command from within R:
devtools::install_github("ggrothendieck/ryacas")
For overview, pointers to additional information, installation instructions and a sample session see http://code.google.com/p/ryacas/
The vignette can be viewed online at https://github.com/ggrothendieck/ryacas/blob/master/inst/doc/Ryacas.pdf
Yacas documentation can be found at http://yacas.readthedocs.org/
Once Ryacas is installed, pointers to additional information can be found with these R commands:
library(Ryacas)
package?Ryacas
The package contains stripped-down yacas distribution. For the complete yacas source code see https://github.com/grzegorzmazur/yacas/ . For more information on yacas see http://www.yacas.org/
Rob Goedman, goedman at mac dot com
Gabor Grothendieck, ggrothendieck at gmail dot com
Søren Højsgaard, Soren.Hojsgaard at agrsci dot dk
Ayal Pinkus, apinkus at xs4all dot nl
Grzegorz Mazur, teoretyk at gmail dot com