On Nov 3, 2011, at 4:40 PM, Peter Langfelder wrote:
On Thu, Nov 3, 2011 at 1:31 PM, Zev Ross <z...@zevross.com> wrote:
Hi Peter,
Thanks for the response. What you've suggested works fine but I'm
looking
for something that is simpler than my solution and avoids the pesky
warning
message. Your response avoids the warning message but just as
complex (if
not more). I just assumed there would be a function along the lines
of:
mydata <- c("A", "C", "A", "D", "B", "B")
reclassify(mydata, inCategories=c("A", "B" ,"C", "D"),
outCategories=c("Group1", "Group1", "Group2", "Group2"))
[1] "Group1" "Group2" "Group1" "Group2" "Group1" "Group1"
But of course, except sometimes you have to write the function
yourself.
reclassify = function(data, inCategories, outCategories)
{
outCategories[ match(data, inCategories)]
}
Sorry I can't make it any simpler than a 1-line solution :)
It will be difficult to beat a oneliner like that. If Zev is still
holding out for a canned solution he might look in the 'car'' package
where there is at least one function that does releveling and
grouping. I foget its name at the moment but it wouldn't hurt a new
learneR to scroll through the entire 'car' suite of functions.
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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