[R] Ryacas

[Jason Romine]

I am having issues with Ryacas errors.  I searched and found this error was
reported in 2006, but nothing since.

> library(Ryacas)
Loading required package: XML
> yacas(expression(Factor(x^2-1)))
[1] "Starting Yacas!"
CommandLine(1) : Expecting ) closing bracket for sub-expression, but got ^
instead
>   yacas("D(x)Sin(x)")
CommandLine(1) : Expecting ) closing bracket for sub-expression, but got Sin
instead
> 

>    x <- Sym('x')
>   (x+1) * (x-1)
CommandLine(1) : Error parsing expression, near token +
> 



os:WindowsXP
Rversion:
R version 2.15.1 (2012-06-22) -- "Roasted Marshmallows"
Copyright (C) 2012 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i386-pc-mingw32/i386 (32-bit)R-2.15.1
Yacas version:1.0.63

Any suggestions appreciated,
Jason



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