[R] power regression: which package?

[David Croll]

Dear R users and R friends,


I have a little problem... I don't know anymore which package to use if
I want to perform a power regression analysis.


To be clear, I want to fit a regression model like this:

fit <- ....(y ~ a * x ^ b + c)

where a, b and c are coefficients of the model.


The R Site does not have the answer I want...


Thanks in advance and with kind regards,


David