how to find start parameters of nls function

hello all,
i'm trying to understand how to use the non linear least squares function in R, what i'm stuck on is how i can guess the start values that i need to provide, i know for some it's easy, for y=ax+b, i can just use a=1,b=1. But how can i find the start values of "any" nls function? i've done some googling, i have read that if you log the base formula you can use the slope and intercept as start values, but how exactly do i do this? could someone give me an example formula that could give me the starting values of a nls fuction?

This topic was automatically closed 21 days after the last reply. New replies are no longer allowed.