Re: [R] weibull model

the function survreg in the package "survival" should what are you looking for. Cheers Anna - Messaggio originale - Da: boshao zhang <[EMAIL PROTECTED]> A: r-help@r-project.org Inviato: Mercoledì 19 marzo 2008, 10:45:43 Oggetto: [R] weibull model Dear Helpers: If

[R] weibull model

Dear Helpers: If you know how to fit a Weibull model using R, you are my savior for my project. The hazard ramda is specified as t^alpha * (1+a*dose*exp(-b*dose)). Or, can we modify the Cox model to capture the proportional part above? Here t is the survial time, dose is a subject received in a ex