I am pleased to announce the immediate availability on CRAN of the new package expint: https://cran.r-project.org/package=expint.
The exponential integral E_1(x) = int_x^\Inf exp(-t)/t dt, x real and the incomplete gamma function G(a, x) = \int_x^\Inf t^{a-1} exp(-t) dt, x > 0, a real are two closely related functions that arise in various fields of mathematics. expint is a small package that intends to fill a gap in R's support for mathematical functions by providing facilities to compute the exponential integral and the incomplete gamma function. Furthermore, and perhaps most conveniently for R package developers, the package also gives easy access to the underlying C workhorses through an API; see the exhaustive package vignette for details. The C routines are derived from the GNU Scientific Library. Best, v. _______________________________________________ R-packages mailing list r-packa...@r-project.org https://stat.ethz.ch/mailman/listinfo/r-packages ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.