Computations for approximations and alternatives for the 'DPQ' (Density (pdf), Probability (cdf) and Quantile) functions for probability distributions in R. Primary focus is on (central and non-central) beta, gamma and related distributions such as the chi-squared, F, and t. – For several distribution functions, provide functions implementing formulas from Johnson, Kotz, and Kemp (1992) <doi:10.1002/bimj.4710360207> and Johnson, Kotz, and Balakrishnan (1995) for discrete or continuous distributions respectively. This is for the use of researchers in these numerical approximation implementations, notably for my own use in order to improve standard R pbeta(), qgamma(), ..., etc: {'"dpq"'-functions}.
Version: 0.6-0 Depends: R (≥ 4.1.0) Imports: stats, graphics, methods, utils, sfsmisc (≥ 1.1-14) Suggests: Rmpfr, DPQmpfr (≥ 0.3-3), gmp, MASS, mgcv, scatterplot3d, interp, cobs Published: 2025-07-08 DOI: 10.32614/CRAN.package.DPQ Author: Martin Maechler [aut, cre], Morten Welinder [ctb] (pgamma C code, see PR#7307, Jan. 2005; further pdhyper()), Wolfgang Viechtbauer [ctb] (dtWV(), 2002), Ross Ihaka [ctb] (src/qchisq_appr.c), Marius Hofert [ctb] (lsum(), lssum()), R-core [ctb] (src/{dpq.h, algdiv.c, pnchisq.c, bd0.c}), R Foundation [cph] (src/qchisq-appr.c) Maintainer: Martin Maechler <maechler at stat.math.ethz.ch> BugReports: https://r-forge.r-project.org/tracker/?atid=2462&group_id=611 License: GPL-2 | GPL-3 | file LICENSE [expanded from: GPL (≥ 2) | file LICENSE] Copyright: see file COPYRIGHTS URL: https://specfun.r-forge.r-project.org/, https://r-forge.r-project.org/R/?group_id=611, https://r-forge.r-project.org/scm/viewvc.php/pkg/DPQ/?root=specfun, svn://svn.r-forge.r-project.org/svnroot/specfun/pkg/DPQ NeedsCompilation: yes Materials: NEWS In views: Distributions CRAN checks: DPQ results Documentation: Downloads: Reverse dependencies: Linking:Please use the canonical form https://CRAN.R-project.org/package=DPQ to link to this page.
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