[R] loading & using Ryacas

[David Winsemius]

On Dec 5, 2012, at 10:21 AM, Alicia Ellis wrote:

> I'm having trouble loading Ryacas.  I've downloaded and extracted  
> Ryacas
> 0.2-9 (also tried Ryacas ) and yacas 1.0.63, have the latest version  
> of R
> and have tried the following (this works for installing other  
> packages):
>
> install.packages("Ryacas")
> library(Ryacas)
> install.packages("yacas")

Yacas is an external program and on the Mac (and Linux) needs to be  
installed outside of R.


> library(yacas)
>
> and get this:
> Warning message:
> package ‘yacas’ is not available (for R version 2.15.2)
>
> Got the same thing for R version 2.15.1.
>
> Suggestions?  I'm fairly new to R and could use some detailed
> instructions.  Working on Mac OSx 10.8.2
>
> Thanks!
> -- 
> Alicia Ellis
> Postdoc
> Gund Institute for Ecological Economics
> University of Vermont
> 617 Main Street
> Burlington, VT  05405
> (802) 656-1046
> http://www.uvm.edu/~aellis5/
> <http://entomology.ucdavis.edu/faculty/scott/aellis/>
>
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>
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David Winsemius, MD
Alameda, CA, USA