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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