[R] Statistics

Douglas Bates bates at stat.wisc.edu
Fri Mar 6 13:29:29 CET 2009

On Thu, Mar 5, 2009 at 7:49 PM, per243 <jose.perezsuarez at csiro.au> wrote:

> How can a non-linear regression to calculate the statistical R-square,
> R-square adjusted, RMSE, VIF??

It is not clear that these statistics are meaningful for a nonlinear
regression model.  For example, an R^2 value is meaningful when the
model being fit contains the constant model because it compares the
fit of the current model to the fit of the model y ~ 1.  Not all
nonlinear regression models contain the constant model as a submodel.

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