You got a perfectly sensible reply from Thereau, the author of the
package, a day after your posting and then failed to respond to his
questions. I'm not sure what more you are expecting.
--
David
On Jan 27, 2011, at 3:43 PM, Johannes Huesing wrote:
Is there a special mailing list for the survival package where my
question would have been more appropriate?
Johannes Huesing <johan...@huesing.name> [Mon, Jan 10, 2011 at
09:26:37PM CET]:
I am trying to model survival data with a Weibull distribution
using survreg. Units are clustered two apiece, sometimes receiving
the same treatment and sometimes opposing treatment.
Residual and predict methods are not carried out on the survreg
object, although the component linear.predictors exists for the
survreg object. Looking at the code I see that the residual method
refuses to run if any of the components of the pterms vector is
equal to 2.
When taking the logarithm of the data and trying a linear mixed
model, residuals and predicted values are produced just fine.
So what is pterms and why is it that, when any component of it
is 2, residuals are not allowed to be displayed?
--
Johannes Hüsing
David Winsemius, MD
West Hartford, CT
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