Package: expint Type: Package Title: Exponential Integral and Incomplete Gamma Function Version: 0.2-1 Date: 2026-01-26 Authors@R: c(person("Vincent", "Goulet", role = c("cre", "aut"), email = "vincent.goulet@act.ulaval.ca"), person("Gerard", "Jungman", role = "aut", email = "jungman@lanl.gov", comment = "Original GSL code"), person("Brian", "Gough", role = "aut", email = "jungman@lanl.gov", comment = "Original GSL code"), person("Jeffrey A.", "Ryan", role = "aut", email = "jeff.a.ryan@gmail.com", comment = "Package API"), person("Robert", "Gentleman", role = "aut", comment = "Parts of the R to C interface"), person("Ross", "Ihaka", role = "aut", comment = "Parts of the R to C interface"), person(given = "R Core Team", role = "aut", comment = "Parts of the R to C interface"), person(given = "R Foundation", role = "aut", comment = "Parts of the R to C interface")) Description: The exponential integrals E_1(x), E_2(x), E_n(x) and Ei(x), and the incomplete gamma function G(a, x) defined for negative values of its first argument. The package also gives easy access to the underlying C routines through an API; see the package vignette for details. A test package included in sub-directory example_API provides an implementation. C routines derived from the GNU Scientific Library . Depends: R (>= 3.3.0) Suggests: gsl, pracma License: GPL (>= 2) URL: https://gitlab.com/vigou3/expint BugReports: https://gitlab.com/vigou3/expint/-/issues Encoding: UTF-8 NeedsCompilation: yes Packaged: 2026-06-24 10:49:13 UTC; root Author: Vincent Goulet [cre, aut], Gerard Jungman [aut] (Original GSL code), Brian Gough [aut] (Original GSL code), Jeffrey A. Ryan [aut] (Package API), Robert Gentleman [aut] (Parts of the R to C interface), Ross Ihaka [aut] (Parts of the R to C interface), R Core Team [aut] (Parts of the R to C interface), R Foundation [aut] (Parts of the R to C interface) Maintainer: Vincent Goulet Repository: https://vigou3.r-universe.dev Date/Publication: 2026-01-27 06:10:36 UTC RemoteUrl: https://github.com/cran/expint RemoteRef: HEAD RemoteSha: c73bcce7388bb125f4bc2f095cbb3f99fd0bdc89