Depricated to Defunct

In the survival package the survConcordance function was replaced by concordance a while 
ago, the latter works for any ordered response (continuous, binary, survival, ...).
I deprecated the old one a couple of years ago.
How long should I have this persist before converting it to Defunct and removing the old 
function?

Terry

Terry M Therneau, PhD
Department of Quantitative Health Sciences
Mayo Clinic
therneau at mayo.edu

"TERR-ree THUR-noh"

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