Lixia:
This is not fundamentally an R issue. You seem to have some confusion
about what IC50's and ED50's are in the statistical modeling context.
I suggest you consult one of the fine statisticians at MD Anderson to
help you resolve your confusion.
Cheers,
Bert
On Tue, Jan 3, 2012 at 10:11 AM,
Hi,
I am trying to use drc package to calculate IC50 value. The ED50 calculated in
some models (LL4 for example) as a response half-way between the upper and
lower limit, which is the definition of the relative IC50 value. Does that mean
the ED50 in drc package is IC50? How the ED function in d
Dr. Ruben Rao
Thanks for your reply .But I don't know that how should I reparameterise the
model.can you reply me in detail for reparameterization and taylor series for
delta method .
Thanks
--- On Tue, 7/13/10, Rubén Roa wrote:
From: Rubén Roa
Subject: RE: [R] ed50
To: "Dipa
I don't know how to reparameterise the model. will you please give the detail
for reparameterisation and delta method?
Thanks
--- On Tue, 7/13/10, Rubén Roa wrote:
From: Rubén Roa
Subject: RE: [R] ed50
To: "Dipa Hari" , r-help@r-project.org
Date: Tuesday, July 13
> -Mensaje original-
> De: r-help-boun...@r-project.org
> [mailto:r-help-boun...@r-project.org] En nombre de Dipa Hari
> Enviado el: lunes, 12 de julio de 2010 22:19
> Para: r-help@r-project.org
> Asunto: [R] ed50
>
> I am using semiparametric Model
> librar
I am using semiparametric Model
library(mgcv)
sm1=gam(y~x1+s(x2),family=binomial, f)
How should I find out standard error for ed50 for the above model
ED50 =( -sm1$coef[1]-f(x2)) / sm1$coef [2]
f(x2) is estimated value for non parametric term.
Thanks
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