[R] Non-linear regression
David Winsemius
dwinsemius at comcast.net
Sun Feb 7 04:49:48 CET 2010
On Feb 6, 2010, at 10:33 PM, kupz wrote:
>
> So I have a data set I would like to model using a non-linear
> method. I know
> it should be an exponential decay. However I know what the first
> derivative
> of the equation should be at two points, x=0 and x=100. Is there
> anyway to
> establish this when inputing the model or how would one go about
> this before
> the nls statement....
Given the rather simple relationship between the exponential function
and its derivative, why would you need the regression if you already
have those two points for dy/dx ( as well as the value of the function
at x=0)? Is this homework?
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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