Mishra, Srikanta <MISHRAS <at> battelle.org> writes:
>
> Is there an R function for evaluating the exponential integral
>
> Ei(x) = INT(-inf,x) exp(t)/t dt
Try the gsl package.
Also library(sos); findFn("{exponential integral}")
although admittedly it doesn't find the Expint page
in the gsl package ...
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