Re: [Rd] quirky behavior from rbinom (PR#8071)

From: Peter Dalgaard <p.dalgaard_at_biostat.ku.dk>
Date: Tue 16 Aug 2005 - 19:53:26 GMT

cpaulse@aecom.yu.edu writes:

> Full_Name: Chris Paulse
> Version: 2.1.1
> OS: WinXP
> Submission from: (NULL) (129.98.60.134)
>
>
> This seems strange. I have a small block of code that repeatedly calls rbinom.
> I put a break in there in case it returns NaN, as I've been having problems with
> this. Here is a transcript from the debug session:
>
> Browse[1]> theP
> [1] 1
> Browse[1]> yleft[dataIndex]
> [1] 3
> Browse[1]> rbinom(1,3,1)
> [1] 3
> Browse[1]> rbinom(1,yleft[dataIndex], theP)
> [1] NaN
>
> Strange, huh?

What is "theP - 1"?

> rbinom(1,3,1+1e-10)

[1] NaN
> 1+1e-10

[1] 1

-- 
   O__  ---- Peter Dalgaard             ุster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)                  FAX: (+45) 35327907

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Received on Wed Aug 17 05:57:04 2005

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