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

[Peter Dalgaard]

cpaulse at 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



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