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I have an incomplete data set that looks like this: Imgur

and I believe that it will continue to form a sigmoid-like shape. How can fit a sigmoid curve to this data given my assumption about what the complete shape should look like?

I am trying to do this in R.

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    $\begingroup$ Have you seen this: kyrcha.info/tutorials/fitting-a-sigmoid-function-in-r ? $\endgroup$ – Bob Jansen Mar 3 '14 at 6:26
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    $\begingroup$ I'm not entirely sure that sigmoid is optimal in this case, but I'd have to know about what you're trying to do to be sure. $\endgroup$ – John Mar 3 '14 at 14:45
  • $\begingroup$ I'm trying to model consumption of a limited resource. Consumption starts to peak around 300, but cannot keep increasing forever (because the resource is limited). I expect it stabilize at some point, but not decrease. $\endgroup$ – user1650502 Mar 4 '14 at 0:23

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