[R] Kaplan-Meier for left truncated data?

[gb]

Is there a function somewhere for estimating the survivor function
(plus confidence limits) when data are both left truncated and right
censored?  survfit in  survival5  doesn't like left truncation.

-- 
 Göran Broström                      tel: +46 90 786 5223
 Department of Statistics            fax: +46 90 786 6614
 Umeå University
 SE-90187 Umeå, Sweden             e-mail: gb at stat.umu.se


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