On Jan 3, 2012, at 12:26 PM, Rich Shepard wrote:
On Tue, 3 Jan 2012, David Winsemius wrote:
How can I identify the non-unique index entries within R?
?duplicated
Thank you, David.
I _think_ the problem comes from a duplated factor column in the data
frame. Now I need to figure out how subset() generated that additional
column.
A subsetting vector could contain (or perhaps cause "[" to create)
duplicates.
data.frame(a=1:10)[ seq(1,10, by=0.5),]
[1] 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10
--
David Winsemius, MD
West Hartford, CT
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