[R] A question about is.interger function

[Michael H. Prager]

Not to belabor the point, but if you really need to distinguish integers 
from other numerical constants, you could try something like this:

 > x <- as.integer(5)
 > typeof(x)
[1] "integer"
 > is.integer(x)
[1] TRUE
 >


on 4/26/2006 1:20 AM Leon said the following:
> Hi, All
> I am using is.integer function to examine whether an object is an integer or not, but I get such results,
>
>   
>> x<-3
>> is.integer(x)
>>     
> [1] FALSE
>
>   
>> x<-3:4
>> x
>>     
> [1] 3 4
>   
>> is.integer(x)
>>     
> [1] TRUE
>
> Seems that the is.integer cannot handle scalers, 
>
>   
>> is.integer(5)
>>     
> [1] FALSE
>
>   
>> is.integer(5:6)
>>     
> [1] TRUE
>
> Is this a bug in R or I made some mistakes? I am using R 2.2.1 under Windows XP
>
> Thanks a lot!
>
> Leon
>
>
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>
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-- 
Michael Prager, Ph.D.
Southeast Fisheries Science Center
NOAA Center for Coastal Fisheries and Habitat Research
Beaufort, North Carolina  28516
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