[R] How to deal with character(0)?

[Erik Iverson]

see ?is.character and ?length

something like

#not tested
dd <- character(0)
is.character(dd) & length(dd) == 0

should do it.



Gang Chen wrote:
> I want to identify whether a variable is character(0), but get lost.  
> For example, if I have
> 
>  > dd<-character(0)
> 
> the following doesn't seem to serve as a good identifier:
> 
>  > dd==character(0)
> logical(0)
> 
> So how to detect character(0)?
> 
> Thanks,
> Gang
> 
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