https://github.com/alexiosg/rcppbessel
Bessel Functions Rcpp Interface
https://github.com/alexiosg/rcppbessel
mathematical-functions r r-package rcpp statistics
Last synced: about 1 month ago
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Bessel Functions Rcpp Interface
- Host: GitHub
- URL: https://github.com/alexiosg/rcppbessel
- Owner: alexiosg
- Created: 2024-08-10T09:13:29.000Z (almost 2 years ago)
- Default Branch: main
- Last Pushed: 2024-08-22T16:10:58.000Z (almost 2 years ago)
- Last Synced: 2025-09-28T13:33:54.073Z (9 months ago)
- Topics: mathematical-functions, r, r-package, rcpp, statistics
- Language: C
- Homepage:
- Size: 78.1 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
[](https://github.com/alexiosg/RcppBessel/actions/workflows/R-CMD-check.yaml)
# RcppBessel
The `RcppBessel` package exports an Rcpp interface for the Bessel functions found in the
`Bessel` package of Maechler by wrapping the functions in the C code (translated
and cleaned up from Amos' original FORTRAN code by Maechler) into C++. Not all
functionality is exposed, in order to keep things simple, but may be expanded
in the future to export more of the functions such as those for the asymptotic
expansion of BesselK and BesselI for large nu and x. The package also exports
the functions for use in R, as it was found to offer a speed up of up to 10x.
The initial motivation for writing this package was so as to allow the modified
Bessel function of the second kind to be used in C++ code which the author needed
in another package. The [Boost](https://www.boost.org/doc/libs/1_85_0/libs/math/doc/html/math_toolkit/bessel/mbessel.html)
implementation does not allow for complex arguments
whilst the special math functions in [std library](https://en.cppreference.com/w/cpp/numeric/special_functions/cyl_bessel_k)
are not available for Mac OS (via the shipped libc++). Additionally, neither of those
implementations has the option of exponential scaling.
# Install
Until the package makes its way to CRAN, you can install it as follows:
``` r
remotes::install_github("alexiosg/RcppBessel", dependencies = TRUE)
```