You haven't provided any code so we have no idea what the problem is. Make sure you have read the troubleshooting sections on the home page? http://ryacas.googlecode.com
Here is an example: > library(Ryacas) Loading required package: XML > x <- Sym("x") > Factor(x^2-1) [1] "Starting Yacas!" expression((x + 1) * (x - 1)) You can also try the rSymPy package. Installation has fewer gotchas: > library(rSymPy) Loading required package: rJava > sympy("var('x')") # define x to be symbolic [1] "x" > sympy("factor(x**2-1)") [1] "-(1 + x)*(1 - x)" See home page at http://rsympy.googlecode.com On Tue, May 5, 2009 at 6:41 PM, Hassan Mohamed <hassan_hany_fa...@yahoo.com> wrote: > Hi, > as I find problems with yacas package... > is there any R function equivalent to the yacas function "Factor" ? > the factor function which i found in the R help is not the same. > it doesn't factor an algebraic expression...... > thanks > hassan > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.