calculating IC50

Perhaps also of interest is the `drc' package on CRAN.  There's an article
in JSS describing it (probably the same as the package vignette--- haven't
checked).

Andy

From: Prof Brian Ripley
On Thu, 2 Feb 2006 Arne.Muller at sanofi-aventis.com wrote:

I was wondering if there is an R-package to automatically 
calculate the 
IC50 value (concentration of a substrance that inhibits 
cell growth to 
50%) for some measurements.
Function dose.p in recommended package MASS.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Hi!

Yes, the 'drc' package can be used to obtain IC50 or any other ICx value 
for several, commonly used dose-response models.

The vignette is more up-to-date than the article in JSS (which dates 
back to the start of 2005).

Christian

Perhaps also of interest is the `drc' package on CRAN.  There's an article
in JSS describing it (probably the same as the package vignette--- haven't
checked).

Andy

From: Prof Brian Ripley

On Thu, 2 Feb 2006 Arne.Muller at sanofi-aventis.com wrote:

I was wondering if there is an R-package to automatically 

calculate the 

IC50 value (concentration of a substrance that inhibits 

cell growth to 

50%) for some measurements.

Function dose.p in recommended package MASS.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

______________________________________________
R-help at 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

______________________________________________
R-help at 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