Hi Hendrik,

  I recall using DRC some time ago and being pleased with it, however I
also recall it being a CRAN package (not bioc).  Have you tried contacting
the package author via their webpage ( http://www.bioassay.dk/ ) ?

  Not to say this is exclusive with people who may have used the package on
bioc-list, but the authors are perhaps the best source for information
about how their functions were intended to be used.

  Best,

--t



On Mon, Feb 25, 2013 at 8:39 PM, Hendrik Falk <falk@wehi.edu.au> wrote:

> Hi,
>
> I'm analysing dose-response data of several treatments using the DRC
> package. My
> observation is that the results for every single treatment changes if
> there are
> other treatments contained in the same data frame.
>
> My understanding (mis-?) is that the function drm() provides for this case:
> 'drm(formula, curveid, pmodels, weights, data = NULL, ...
>
> Arguments:
> (...)
> curveid - a numeric vector or factor containing the grouping of the data.'
>
> Is it correct use to provide drm() with a data.frame containing doses,
> responses and
> several treatments or is the only way to split everything up into one data
> frame per
> treatment?
>
> Cheers,
> Hendrik
>
>
>
> ______________________________________________________________________
> The information in this email is confidential and inte...{{dropped:21}}

