Parametric Proportional Hazards form of AFT Models
Parametric Proportional Hazards form of AFT Models
Translates an accelerated failure time (AFT) model fitted by psm to proportional hazards form, if the fitted model was a Weibull or exponential model (extreme value distribution with "log" link).
pphsm(fit)## S3 method for class 'pphsm'print(x, digits=max(options()$digits -4,3),correlation=TRUE,...)## S3 method for class 'pphsm'vcov(object,...)
Arguments
fit: fit object created by psm
x: result of psm
digits: how many significant digits are to be used for the returned value
correlation: set to FALSE to suppress printing of correlation matrix of parameter estimates
...: ignored
object: a pphsm object
Returns
a new fit object with transformed parameter estimates