On 6/10/2009, at 9:01 AM, Jill Hollenbach wrote:
Hi all,
I think this is a very basic question, but I'm new to this so
please bear
with me.
I'm using match to translate elements of a data frame using a
lookup table.
If the content of a particular cell is not found in the lookup
table, the
function returns NA. I'm wondering how I can just ignore those
cells, and
return the original contents if no match is found in the lookup table.
Many thanks in advance, this site has been extremely helpful for me
so far,
Jill
It's not clear to me just what you want to accomplish, but it's possible
that setting nomatch=0 in your call to match() might get you somewhere.
Note that xxx[c(0,1,2,3] gives xxx[c(1,2,3)] whereas
xxx[c(NA,1,2,3)] gives c(NA,xxx[c(1,2,3)]).
cheers,
Rolf Turner
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