[R] formula for nls
Gabor Grothendieck
ggrothendieck at gmail.com
Wed Jan 23 21:15:14 CET 2008
Try port algorithm. Please provide complete reproducible code and data
when posting.
> y <- 1/(x <- 1:5)
> nls(y~k/x^n, start=list(k=1, n=1), algorithm = "port")
Nonlinear regression model
model: y ~ k/x^n
data: parent.frame()
k n
1 1
residual sum-of-squares: 0
Algorithm "port", convergence message: both X-convergence and relative
convergence (5)
On Jan 23, 2008 2:58 PM, Jarek Jasiewicz <jarekj at amu.edu.pl> wrote:
> Hi!
>
> How to write in model's formula of type:
>
> nls(y~k/(x^n), data=data, start=list(k=1,n=1))
> i.e the problem is on x^n, I(x^n) generate error
>
> thanks
> Jarek
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