[Rd] pweibull.c (PR#1334)

Martin Maechler Martin Maechler <maechler@stat.math.ethz.ch>
Sat, 2 Mar 2002 16:58:18 +0100

>>>>> "Morten" == Morten Welinder <terra@diku.dk> writes:

    Morten> Full_Name: M Welinder Version: 1.4 OS: (src)
    Morten> Submission from: (NULL) (

    Morten> It seems to me that pweibull can be improved in the
    Morten> lower_tail=TRUE and log_p=FALSE case by using expm1.
    Morten> Something like

    Morten> -expm1(-pow(x / scale, shape)),

yes; now that in R-devel (1.5.0 to be)
 expm1() is guaranteed to be available -- I've changed it there.

Note that this is not only for log_p=FALSE, but for both cases
of lower_tail=TRUE

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