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2013 Mar 05
0
Error message from flexsurvreg
I'm working on a survival analysis project and, based on previous work of
my colleagues on similar projects, am trying to estimate an AFT model with
a generalized gamma distribution. When I execute the following code:
>flexsurvreg(timesurv ~ cycles + rcycle + cyctime, dist="gengamma")
I get the following error message:
Error in optim(optpars, minusloglik.flexsurv, t = Y[,