[R] sequential treatment of a vector for formula

[Bert Gunter]

Are you using R's search capabilities (to say nothing of Google's)?

RSiteSearch("Gompertz", restr="func")

brings up several functions/packages that might do what you need.

Bert Gunter
Genentech Nonclinical Biostatistics
 
 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
Behalf Of David Winsemius
Sent: Thursday, May 27, 2010 10:04 AM
To: Frostygoat
Cc: R-help at r-project.org Help; Bert Gunter
Subject: Re: [R] sequential treatment of a vector for formula


On May 27, 2010, at 12:32 PM, Frostygoat wrote:

> Thanks very much David. Bert, I've seen the Survival package and it

survival   ... correct capitalization is important in R.

> does not do what I need, which is to fit Gompertz curves to survival
> data and compute lifetable statistics for other functions. There is
> the SSgompertz package for growth curves, not what I need either.

Have you reviewed the capabilities of the eha package?

http://cran.r-project.org/web/packages/eha/eha.pdf

I thought that I had seen examples of the use of the Design package  
(and presumably this would have applied to the rms package) for  
fitting Gompertz models in an accelerated failure time framework, but  
checking Harrell's RMS text fails to confirm this memory.

-- 

David Winsemius, MD
West Hartford, CT

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