[R] warning message

[Shi, Tao]

Never mind.  I got it.  Thanks!

Tao



----- Original Message -----
> From: "Shi, Tao" <shidaxia at yahoo.com>
> To: "r-help at r-project.org" <r-help at r-project.org>
> Cc: 
> Sent: Monday, October 15, 2012 4:08 PM
> Subject: [R] warning message
> 
> Hi list,
> 
> Can somebody explain why there are these warning messages?  I just don't get 
> it.  I'm using R 2.15.1 on WinXP.
> 
> Thanks!
> 
> Tao
> 
> 
>>  x
> [1] -2.143510 -1.157450 -1.315581  1.033562 -1.225440 -1.179909
> 
>>   ifelse(x>0, log2(x), -log2(-x))
> [1] -1.099975 -0.210950 -0.395700  0.047625 -0.293300 -0.238675
> Warning messages:
> 1: In ifelse(x > 0, log2(x), -log2(-x)) : NaNs produced
> 2: In ifelse(x > 0, log2(x), -log2(-x)) : NaNs produced
> 
> 
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