On Dec 4, 2009, at 8:42 PM, Jill Hollenbach wrote:
Hi all,
I would like to combine elements of a vector:
vec <- c("astring", "b", "cstring", "d", "e")
vec
[1] "astring" "b" "cstring" "d" "e"
such that for every element that contains "string" at the end, it is
combined with the next element, so that I get this:
res
[1] "astringb" "cstringd" "e"
It will be problematic if there are two "string" elements in a row,
but if you can assure me that is not so, then this may suffice:
> res <- vec
# First do the pasting
> res[grep("string", vec)] <- paste(vec[grep("string",
vec)],vec[grep("string", vec)+1],sep="")
# Now need to remove the strings which were concatenated to the prior
ones
> res <- res[-(grep('string', res)+1)]
> res
[1] "astringb" "cstringd" "e"
Any help is much appreciated, still learning.
As are we all. Why do you think we do this?
Many thanks,
Jill
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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