[Rd] bug in rbinom? (PR#448)
Prof Brian Ripley
Prof Brian Ripley <ripley@stats.ox.ac.uk>
Thu, 17 Feb 2000 12:48:21 +0000 (GMT)
> From: dtrenkler@nts6.oec.uni-osnabrueck.de
> Date: Thu, 17 Feb 2000 13:08:53 +0100 (MET)
>
Thanks for the report: now fixed. rbinom was only checking if p was
unchanged, and not setting up correctly if n changed too.
> In version 0.99.0 for Windows NT I get the following:
>
> > .Random.seed
> [1] 0 21012 4461 28299
> > rbinom(10,10,.3)
> [1] 4 5 5 1 5 2 4 2 6 2
> > rbinom(10,9,.3)
> [1] 0 0 0 0 0 0 0 0 0 0
> > rbinom(10,10,.3)
> [1] 3 3 2 2 3 1 3 3 3 2
> > rbinom(10,11,.3)
> [1] 0 0 0 0 0 0 0 0 0 0
>
>
> I tried similar inputs in version 0.65.1:
>
> > .Random.seed
> [1] 0 16049 70 30225
> > rbinom(10,10,.3)
> [1] 3 5 3 1 1 3 3 2 5 1
> > rbinom(10,11,.3)
> [1] 1 3 2 3 4 3 4 2 1 5
> > rbinom(10,100,.3)
> [1] 20 0 0 0 0 0 0 0 0 0
> > rbinom(10,100,.3)
> [1] 0 0 0 0 0 0 0 0 0 0
>
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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