On Fri, Oct 2, 2009 at 7:23 PM, Peter Ehlers ehl...@ucalgary.ca wrote:
Hello Rainer,
I think that your problem is with trying to fit a logistic model to
data that don't support that model. Removing the first two points
from your data will work (but of course it may not represent reality).
Hi Rainer,
Sorry, I hadn't read your post quite carefully enough.
The problem appears to be with SSlogis. It seems that
control parameters are not being passed through SSlogis.
If you specify a start vector, minFactor can be set.
nls( y ~ Asym/(1+exp((xmid-x)/scal)), data = dat,
Hi
I want to change a control parameter for an nls () as I am getting an error
message step factor 0.000488281 reduced below 'minFactor' of 0.000976562.
Despite all tries, it seems that the control parameter of the nls, does not
seem to get handed down to the function itself, or the error
Hello Rainer,
I think that your problem is with trying to fit a logistic model to
data that don't support that model. Removing the first two points
from your data will work (but of course it may not represent reality).
The logistic function does not exhibit the kind of minimum that
your data
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