[R] find an empty char in the name of a vector

[Uwe Ligges]

On 15.05.2014 12:12, carol white wrote:
> Hi,
> I have a vector with the name of an element that is empty. How can I find out the index of this element? The following doesn't work:
>
> empty.char = grep('[:blank:||:space:]' ,names(v))
> if (length(empty.char)>0)
>      ....

  grep("^[[:space:]]*$", c(x,y))



> How about if the name of one element is g_ and the name of other elements g_anyword     where any word contain alphanumeric characters and I want to find the one whose name contain only g_?

  grep("g_$", names(v))


Uwe Ligges

>
> Cheers,
>
> Carol
>
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