[R] Precision in R

From: Francisco Fuentes <franciscofuentes2005_at_yahoo.co.uk>
Date: Fri 06 May 2005 - 04:01:43 EST


Could anyone help me with the following issue. Using the GSL library in R I define the following code:

#########
library(gsl);
S<-function(n)
{ r<-0:n;
ans<-sum(gsl_sf_choose(n,r)*(-1)^r*2^(2*r)*gamma_inc(6-2*r,2)) ans }
#########
>SS(10) yields 34.91868
>SS(40) yields 5.340422
>SS(60) yields 180.3162


Doing the same computations in maple I get  

34.918679360927169740821310620770402166885975646756 5.340473872869891061658721253647686930049562214921 2.2269219454888559341895277572725106  

respectively. Is this a precision problem?                 


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