Ryacas		Examples of R and yacas working together.
Ryacas-PrettyPrinter		Example of PrettyPrinter output.
Ryacas-Function		Differentiate R fn creating another R function.
Ryacas-gui	Simple graphical user interface
Ryacas-Sym		Similar to Ryacas demo but using the Sym interface.
Ryacas-Expr		Expr is like Sym but uses expressions, not strings.

