[R] Starting estimates for nls Exponential Fit

[Christian Ritz]

Hi Antoon,

now that you mention trying out different methods, maybe you should consider fitting a
sigmoidal curve to the entire dataset and not only the exponential part (which constitutes
a very small dataset) as seems to have been the endeavour that initiated the posting to
R-help.

One options would then be to use the package qpcR and simply fitting a sigmoidal model
using for instance drm() in the package drc or nls() combined with SSfpl().

Just a suggestion.


Christian