[R] Is this a bug of pweibull()?

[Martin Maechler]

>>>>> "Lu" == Lu Chi-Hsien Joseph <cjlu at ibm.stat.ncku.edu.tw> writes:

    Lu> In rw1050, I found that
    >> pweibull(3:10, 2)
    Lu> [1] 0.9998766 0.9999999 1.0000000 1.0000000       NaN       NaN
    Lu> [7]       NaN       NaN
    Lu> Warning message: 
    Lu> NaNs produced in: pweibull(q, shape, scale, lower.tail, log.p) 

    Lu> more surprisingly,
    >> pweibull(3:10, 2.1)
    Lu> [1] 0.9999566 1.0000000 1.0000000      -Inf       NaN       NaN
    Lu> [7]       NaN       NaN
    Lu> Warning message: 
    Lu> NaNs produced in: pweibull(q, shape, scale, lower.tail, log.p) 

    Lu> Is this a bug of pweibull() in rw1050?

Probably a problem with Windows / Math library behavior.
The above example works fine in three different Unix versions I
have access to (on Saturday morning).

Can others, particularly Windows users, check this?

Thanks,
Martin Maechler

    >> version
    Lu> _              
    Lu> platform i386-pc-mingw32
    Lu> arch     i386           
    Lu> os       mingw32        
    Lu> system   i386, mingw32  
    Lu> status                  
    Lu> major    1              
    Lu> minor    5.0            
    Lu> year     2002           
    Lu> month    04             
    Lu> day      29             
    Lu> language R    

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