Try the rSymPy or Ryacas packages. In the rSymPy code below the var command defines x as symbolic to sympy and then we perform the computation:
> library(rSymPy) Loading required package: rJava > sympy("var('x')") [1] "x" > sympy("limit(x*x + x + 2, x, 2)") [1] "8" Or using devel version define x as symbolic first to sympy and then to R: > library(rSymPy) > source("http://rsympy.googlecode.com/svn/trunk/R/Sym.R") > sympy("var('x')") [1] "x" > x <- Sym("x") > limit(x*x + x + 2, x, 2) [1] "8" or using Ryacas: > library(Ryacas) Loading required package: XML > x <- Sym("x") > Limit(x^2+x+2, x, 2) [1] "Starting Yacas!" expression(8) More info is available here which you should read before using these packages: http://rsympy.googlecode.com http://ryacas.googlecode.com On Tue, May 5, 2009 at 5:39 AM, Hassan Mohamed <hassan_hany_fa...@yahoo.com> wrote: > Hey, > what is the R function for the mathematical limit ? > e.g. to calculate and return the amount that the expression > X^2 +X +2 > approach > as X approach 2 > (X-> 2) > 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.