>>>>> "Adrian" == Adrian Custer <[EMAIL PROTECTED]> >>>>> on Thu, 18 Mar 2004 18:47:54 -0800 writes:
Adrian> Hello all, Adrian> In the course of trying to implement the CDF of an Adrian> InverseGammaDistribution, I have run across the need for an igamma() Adrian> function. Several others have needed this function but the answers I Adrian> have found so far are not totally clear to me. I'm writing for three Adrian> reasons: Adrian> 1) to present a small error in the docs I don't agree. Did you look at the postscript or PDF version of the help file? {you can get with help(pgamma, offline=TRUE) when you have a working latex installation} If you compare its formula with Abramowitz & Stegun 6.5.1 its pretty pretty very very obvious that P(a,x) == pgamma(x,a) {so forget about 'rate' or 'scale' which are both 1 by default!) Why should this be hard to see? Shuldn't you first do your homework before starting to insult the R developers? Regards, Martin Maechler, Seminar fuer Statistik, ETH Zurich Switzerland ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html