Question about curve fitting...
On Wed, 10 Aug 2005, S.O. Nyangoma wrote:
I see that log(y)=log(k1)+k2*log(x) use lm?
Thats a nice solution in this instance, but in general how do I get R to fit a particular function (formula) and return the parameters? Cheers, Dan.
----- Original Message ----- From: Dan Bolser <dmb at mrc-dunn.cam.ac.uk> Date: Wednesday, August 10, 2005 11:41 am Subject: [R] Question about curve fitting...
Meta: This question is somewhat long and has two parts, I would be very happyfor someone just to nudge me in the right direction with the manual / tutorial, as I am somewhat lost... 1) How do I fit a curve of the form "y = k1 * x^k2" ? I want to estimate values of k1 and k2 given the x/y data I have, and I can't work out how to get R to calculate and return their estimates. 2) Given the value of k1 and k2 for population A, how can I test if population B has significantly different values of k1 and k2? Sorry for the basic question. I think I just need to read up on a few functions. I have about 50 xy pairs in total if that makes a difference. Dan.
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