They are not 'stripped': nothing says that because you named the starting
value that other values will be named.
You are misusing nls(): the documented way would be to have
data.x <- 1:50
data.y <- pi*data.x + rnorm(50,sd=20)
fitting.fn <-function(x, a, b) a + b*x
nls(data.y ~ fitting.fn(data.x
Dear R-dev,
I have been having some problems with regards to names in the parameter
vector being stripped when passed to the objective function when using
nls(). I was relieved to find that it wasn't me, and that this behaviour has
previously been reported in optim() also. See eg
https://stat.ethz
