Documentation Bugs (PR#1618)

[maechler@stat.math.ethz.ch]

>>>>> "Brett" == Brett Presnell <presnell@stat.ufl.edu> writes:

    Brett> Just a few documentation "bugs" that I've noticed
    Brett> recently.

Thank you!

    Brett> 1.  In the help for (dpqr)weibull(), the formula
    Brett> given for the variance of a Weibull is wrong.  

yes..

    Brett> The correct formula is

    Brett>       b^2 * sqrt(gamma(1 + 2/a) - (gamma(1 + 1/a))^2))

which is even wronger, but I'm sure you meant

         	 b^2 *     (gamma(1 + 2/a) - (gamma(1 + 1/a))^2)


    Brett>     Note that I've also changed Gamma to gamma, which
    Brett> I think is preferable since this is actually the name
    Brett> of the gamma() function in R (whereas Gamma() is
    Brett> quite a different animal).

(but in LaTeX, that's  \Gamma  and that's why we have used it
 even for the non-latex formula (you see in the text and html
 version of help).

    Brett> 2.  The help for quantile() function (in base) refers
    Brett> to the function ecdf(), but doesn't mention that it
    Brett> is in package stepfun (which is not loaded by
    Brett> default).  It would be helpful if it did.

yes, it seems, thank you; I'm adding it.

    Brett> 3.  There's a typo in the help for optim():
    Brett> "comprehansive".

(BDR has already fixed this).

Thanks once more!

Martin Maechler <maechler@stat.math.ethz.ch>	http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum  LEO C16	Leonhardstr. 27
ETH (Federal Inst. Technology)	8092 Zurich	SWITZERLAND
phone: x-41-1-632-3408		fax: ...-1228			<><

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