You have not specified a nonlinear formula. There are no parameters to
estimate in the formula you provide, y1~dist. What is the nonlinear
relation you are trying to fit? Look at the help file for nls to see some
examples worked.
?nls
Jean
Gyanendra Pokharel wrote on 10/01/2012
10:27:23
Hi all,
I got following problem in fitting the data.
Any kind of suggestions are welcome
> beta <- 3.5
> d <- seq(0.1,62.5,0.1)
> y <- exp(-beta*d)
> y1 <- y
> x <- read.table("epidist.txt", header = TRUE)
> data.nls <- as.data.frame(cbind(y1,x))
> #attach(data.nls)
> nls.fit <- nls(y1~dist,data.
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