[R] Port package

[Jos Kaefer]

Hi

When I type:
> ?nls

I come across this section:

algorithm: character string specifying the algorithm to use. The
          default algorithm is a Gauss-Newton algorithm.  Other
          possible values are '"plinear"' for the Golub-Pereyra
          algorithm for partially linear least-squares models and
          '"port"' for the 'nl2sol' algorithm from the Port package.

The simple question is: where's the Port package?
I can't find it on cran.

Thanks,
Jos