R-beta: Small problems with R0.49
Kurt Hornik
Kurt.Hornik at ci.tuwien.ac.at
Wed Apr 30 10:20:22 CEST 1997
>>>>> Jim Lindsey writes:
> Suggestions:
> 1. d, p, q, and r functions for inverse Gauss and Laplace
> distributions.
> 2. Add a fifth function for continuous distributions, the hazard
> function, h. For example, ht <- function(...) dt(...)/(1-pt(...))
> is the Student t hazard function.
> For writing likelihood functions, these would be much faster in C than
> R and some such as Weibull can be simplified.
> 3. Add the five functions for three parameter distributions such as
> generalized F, extreme value, etc., Box-Cox,... (I have the densities,
> cumulative, and hazard as R functions.)
> 4. Philippe Lambert and I have d and p functions working in R for the
> four-parameter stable family by inverting the characteristic function
> with a Fourier transform (requires C code). S-plus only has the r
> function for stables.
It would definitely be wonderful to have all these functions available.
I am a bit worried about over-polluting the name space, though. (I was
never too happy with pf and their likes.)
-k
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
More information about the R-help
mailing list