I am trying to get a decay curve fitted to this data to get the values for other distances in R.
data
I have tried a few self-starting models (SSmicem, SSsymp), but these dont seem to appreciate that I want this to be a decay curve and I end up with relatively large values towards the tail end here.
I am wishing that the model comes to the asymptote of close to 0, but all models i have produced are giving large values at the tail end (larger than the observed values).
Is there a way i can set this asymptote?
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