Hi,
Hi,
If the names vector is similar to below:
v2 <- c("g_", "", " ","g2"," ", "g3")
grep("^$| +",v2)
#[1] 2 3 5
#or
grep("^\\s*$",v2)
#[1] 2 3 5
A.K.
On Thursday, May 15, 2014 6:36 AM, arun <smartpink...@yahoo.com> wrote:
Hi,
Assuming that this is the case:
v2 <- c("g_", "", "g2","g3")
which(v2=="")
#[1] 2
##Second question
v1 <- c("g_", "g_w1", "g_w2", "g_bc3")
grepl("\\bg_\\b",v1)
#[1] TRUE FALSE FALSE FALSE
v1[grepl("\\bg_\\b",v1)]
#[1] "g_"
A.K.
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)
....
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_?
Cheers,
Carol
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