Re: [R] calculating IC50

From: Christian Ritz <ritz_at_bioassay.dk>
Date: Fri 03 Feb 2006 - 01:39:04 EST

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

Liaw, Andy wrote:

>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@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@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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>>
>>
>>
>>
>
>______________________________________________
>R-help@stat.math.ethz.ch mailing list
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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 Fri Feb 03 01:49:24 2006

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