PDL::R::math - routines from statistics language, R, for PDL
This module provides access to many of the statistical functions available in the nmath library of the R statistical language.
It is assumed that users of this library are already familar with the R language. The documentation will be sparse and where appropriate will focus on the differences between pure R and PDL:R.
A key point in understanding PDL::R is that the calling convention for functions is slightly different than pure R.
Specifically there are no implicit or default values for functions, nor does PDL::R support named parameters. [Though this may change at a later date...]
For example in R the documentation for the dunif functions is:
dunif(x, min=0, max=1, log=FALSE) # Pure R
Which would allow for dunif to be called from pure R as:
dunif(x) # Pure R, default values dunif(x,0,5,0) # Pure R, all values defined dunif(x,max=10,min=0,log=TRUE) # Pure R, named parameters
In PDL::R, you *must* specify *all* of the parameters in the order they are defined in the documentation.
The functions above would be written in PDL::R as:
dunif(x,0,1,0) # PDL::R, specifying all parameters dunif(x,0,5,0) # PDL::R, specifying all parameters dunif(x,0,10,1) # PDL::R, no named parameters
This document and and the PDL::R interface are copyrighted: Copyright (C) 2001 John Cavanaugh, Copyright (C) 1998 John Lapeyre under the terms in the file COPYING in the PDL distribution.
This document is a modified version of the documentation found in the R distribution. It is modified only to provide a description of the PDL calling sytax.
The R language including all sources and documentation is copyrighted under the terms of the Gnu Public License: R : A Computer Langage for Statistical Data Analysis Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka
The PDL language is copyrighted: Copyright (C) R.J.R. Williams 1997 (email@example.com), Karl Glazebrook (firstname.lastname@example.org) and Tuomas J. Lukka (Tuomas.Lukka@helsinki.fi).
All rights reserved. There is no warranty. You are allowed to redistribute this software / documentation under certain conditions. For details, see the file COPYING in the PDL distribution.
- Doesnt implement all of the functions of R. - Doesnt handle default values or named parameters.