Because it's a character vector with only one element, which just happens to be
empty - sort of like why the cardinality of the set { /O } is one. (/O being my
best shot at the empty set symbol in plain text).
You might be thinking of nchar().
Michael
On Nov 18, 2011, at 10:09 AM, "Jaensch, Steffen [TIBBE]" <sjaen...@its.jnj.com>
wrote:
> Hi all,
>
>
>
> Can somebody explain why length("") returns 1 and not 0? How do I test
> if a given string is the empty string?
>
>
>
> Thanks,
>
> Steffen.
>
>
>
>
>
>
>
>
> [[alternative HTML version deleted]]
>
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