[R] Full likelihood from survreg

2009-05-27 Thread Ullrika Sahlin
R users, I am making model selection with an accelerated failure time model using the command survreg within the library survival. As I want to compare models with different probability distributions I need to have the full likelihood. How can I find out what survreg generates: the full

[R] understanding the output from survival analysis

2009-03-09 Thread Ullrika Sahlin
Why do I get different sign of the coefficients of covariates when I run the semi-parametric proportional hazard model (coxph) compared to the parametric proportional hazard model (survreg)? Anyone with experience in extracting information form survreg to make predictions are free to contact me