Re: [R] Survival dummy variables and some questions

From: Adaikalavan Ramasamy <ramasamy_at_cancer.org.uk>
Date: Tue 19 Jul 2005 - 21:30:03 EST

Stephen,

This has nothing to do with your R but to do with your email settings.

Are you sure you are sending mails in plain text ? Your email on the R-help mailing archive (see link below) appears to be unreadable https://stat.ethz.ch/pipermail/r-help/2005-July/074210.html

Please try to use plain text. (See http://expita.com/nomime.html).

Regards, Adai

On Tue, 2005-07-19 at 08:59 +0200, Stephen wrote:
> Many thanks I follow you what you say.... You can request predicted
> values at any sequence of ages - I guess there are plenty of postings on
> how to do that .... Regards, Stephen ----- 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 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 >> onset) and then turn theu
> resultant categorical variable into a factor as >> opposed to a
> variable... that is when the problems began.... An >> alternative
> approach to pulling out different values at different levels >> of the
> variable is what I seek. 2. I looked for the link, but can't > > Your
> needs don't require categorization. You can request predicted values >
> at any sequence of ages. If you want hazard ratios you can take >
> differences in predicted log hazards and antilog them. > > Frank > > >
> -- > Frank E Harrell Jr Professor and Chair School of Medicine >
> Department of Biostatistics Vanderbilt University >
>
> ???? ?"? ???? ????
> http://mail.nana.co.il
>
> [[alternative HTML version deleted]]
>
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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Jul 19 21:35:47 2005

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