[R] Which - value not present

[jim holtman]

length(result) == 0

> result <- integer(0)
> result
integer(0)
> length(result) == 0
[1] TRUE
>


On Tue, Nov 9, 2010 at 9:55 PM, vioravis <vioravis at gmail.com> wrote:
>
> I am trying to use which function to obtain the index of a value in a
> dataframe. Depending on whether the value is present in the dataframe or not
> I am performing further operations to the dataframe.
>
> However, if the value is not present in the dataframe, I am getting an
> integer(0).
>
> How do I check for integer(0)? something like is.na???
>
> Thank you.
>
> Ravishankar
>
>
>
>
>
>
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?