I believe from your description that this is interval-censored survival and can be handled by survreg.
It would also be very easy to amend polr to do this. On Wed, 30 Jun 2004, Thomas Ribarits wrote: > does anyone have a quick answer to the question of how to carry out > interval regression in R. I have found "ordered logit" and "ordered > probit" as well as multinomial logit etc. The thing is, though, that I > want to apply logit/probit to interval-coded data and I know the cell > limits which are used to turn the quantitative response into an ordered > factor. Hence, it does not make sense to estimate the cell limits (e.g. > in zeta for the function polr). -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
