Re: [R] Survival dummy variables and some questions

2005-07-19 Thread Adaikalavan Ramasamy
- Original Message - From: Frank E Harrell Jr To: Stephen Cc: Prof Brian Ripley ; Sent: Monday, July 18, 2005 6:13 PM Subject: Re: [R] Survival dummy variables and some questions Stephen wrote: Hi 1. Right perhaps this should clarify. I would like to extract coefficeints for different

Re: [R] Survival dummy variables and some questions

2005-07-19 Thread Stephen
Thanks For pointing that out. S - Original Message - From: Adaikalavan Ramasamy To: Stephen Cc: Frank E Harrell Jr ; Prof Brian Ripley ; Sent: Tuesday, July 19, 2005 1:30 PM Subject: Re: [R] Survival dummy variables and some questions Stephen, This has nothing to do with your R

Re: [R] Survival dummy variables and some questions

2005-07-18 Thread Frank E Harrell Jr
Stephen wrote: Hi All, I am currently conducting some survival analyses. I would like to extract coefficients at each level of the IVs. I read on a previous posting that dummy regression using coxph was not possible. I'm not sure what that means. Therefore I though, hey why

Re: [R] Survival dummy variables and some questions

2005-07-18 Thread Stephen
: Re: [R] Survival dummy variables and some questions Stephen wrote: Hi All, I am currently conducting some survival analyses. I would like to extract coefficients at each level of the IVs. I read on a previous posting that dummy regression using coxph was not possible. I'm not sure what

Re: [R] Survival dummy variables and some questions

2005-07-18 Thread Prof Brian Ripley
: Re: [R] Survival dummy variables and some questions Stephen wrote: Hi All, I am currently conducting some survival analyses. I would like to extract coefficients at each level of the IVs. I read on a previous posting that dummy regression using coxph was not possible. I'm not sure

Re: [R] Survival dummy variables and some questions

2005-07-18 Thread Frank E Harrell Jr
Subject: Re: [R] Survival dummy variables and some questions Stephen wrote: Hi All, I am currently conducting some survival analyses. I would like to extract coefficients at each level of the IVs. I read on a previous posting that dummy regression using coxph was not possible. I'm

Re: [R] Survival dummy variables and some questions

2005-07-18 Thread Frank E Harrell Jr
Stephen wrote: Hi 1. Right perhaps this should clarify. I would like to extract coefficeints for different levels of the IVs (covariate). So for instance, age of onset I would want Hazards etc for every 5 years and so on... The approach I took was to categorize the variables (e.g., age of

Re: [R] Survival dummy variables and some questions

2005-07-18 Thread Stephen
:13 PM Subject: Re: [R] Survival dummy variables and some questions Stephen wrote: Hi 1. Right perhaps this should clarify. I would like to extract coefficeints for different levels of the IVs (covariate). So for instance, age of onset I would want Hazards etc for every 5 years and so

[R] Survival dummy variables and some questions

2005-07-17 Thread Stephen
Hi All, I am currently conducting some survival analyses. I would like to extract coefficients at each level of the IVs. I read on a previous posting that dummy regression using coxph was not possible. Therefore I though, hey why not categorize the variables (I realize some folks object