[R] Fitting data to a sigmoidal curve

[sarahkm]

Hi-
I'm a biologist trying to figure out the growth rate of salamanders in
different ponds. I collected individuals from various populations at
different dates, and using the size and date collected, I want to figure out
the growth curve of each population. My question is: How do I fit my data to
a Gompertz function in R?
Thank you so much!
Sarah
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