expint News

CHANGES IN expint VERSION 0.2-1

• The package vignette now contains an appendix providing more details on the fix introduced in version 0.2-0 for the computation of the incomplete gamma function for small negative values of a.

CHANGES IN expint VERSION 0.2-0

BUG FIXES

• gammainc now handles values of a in (-0.5, 0) correctly by using the standard recursion, relying on the accuracy of pgamma for small values of a; fixes issue #2.

CHANGES IN expint VERSION 0.1-9

BUG FIXES

• Replacement of a few API entry points for C API compliance introduced in R 4.5.0.

CHANGES IN expint VERSION 0.1-8

NEW FEATURE

• Unit tests for the incomplete gamma function based on the definition, and for the exponential integrals based on a table of Abramowitz and Stegun.

BUG FIXES

• Include prototypes for all C level functions to please -Wstrict-prototypes.

CHANGES IN expint VERSION 0.1-7

BUG FIXES

• Replace deprecated (as of R 4.2.0) macro DOUBLE_EPS by DBL_EPSILON in C code.

• Remove the unnecessary LazyData entry in the DESCRIPTION file.

CHANGES IN expint VERSION 0.1-6

• Fixed the example API and the documentation in the vignette. The previous implementation yielded duplicated symbols with option -fno-common that will be the default in gcc starting with version 10.0.x. Thanks to Joshua Ulrich josh.m.ulrich@gmail.com, maintainer of xts and TTR for proposing the fix.

CHANGES IN expint VERSION 0.1-5

• Minor documentation and comments updates.

CHANGES IN expint VERSION 0.1-4

BUG FIX

• Usage of R_useDynamicSymbols to preclude compilation NOTEs, better registration of native routines and reduced symbol visibility.

• Vignette no longer uses LaTeX package framed as it was not found on OS X in CRAN builds.

CHANGES IN expint VERSION 0.1-3

BUG FIX

• Fixed wrong values for expint_E1(x, scale = TRUE) for x in (-4, -1] or x in (0, 1]. Thanks to Vincent Dorie vjd4@nyu.edu for the catch and report.

CHANGES IN expint VERSION 0.1-2

• Yet more authors (actually copyright holders) added to the list of authors.

CHANGES IN expint VERSION 0.1-1

BUG FIX

• Fixed improper use of macro ISNAN (and ISNA) that caused compilation to fail on Linux and Solaris.

OTHER CHANGES

• Original author of GSL code for expint and gamma_inc (G. Jungman) added as an author of the package.

• Improved (read: more explicit) copyright notices to GSL, R Core Team and R Foundation where appropriate.

CHANGES IN expint VERSION 0.1-0

• Initial release. The package provides the R functions to compute the exponential integrals E_1(x), E_2(x), E_n(x) and Ei(x), and the incomplete gamma function G(a, x). The package also provides a C API to access the actual workhorses expint_E1, expint_E2, expint_En and gamma_inc. Sub-directory ‘example_API’ of the package installation directory contains a complete test package implementing API usage.