I am having troubles in fitting functions of the form

y~a*x^b+c
 to data, for example

x<-c(0.1,0.36,0.63,0.90,1.166,1.43, 1.70, 1.96, 2.23)
y<-c(8.09,9.0,9.62,10.11,10.53,10.9, 11.25, 11.56, 11.86)

I tried for example with nls, which did only work with really good initial guessed values.
Any suggestion, what I should use?
Thanks a lot
Thomas


	[[alternative HTML version deleted]]

