Density, Probability, Quantile ('DPQ') Computations

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. -- 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}.


Reference manual

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0.5-1 by Martin Maechler, a month ago,

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Browse source code at

Authors: 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)

Documentation:   PDF Manual  

Task views: Probability Distributions

GPL (>= 2) license

Imports stats, graphics, methods, utils, sfsmisc

Suggests Rmpfr, DPQmpfr, gmp, Matrix, MASS, mgcv, scatterplot3d, akima

Imported by DPQmpfr.

See at CRAN