gwr, calculate hatmatrix when fit points are given

On Thu, 9 Aug 2012, Maximilian Spro? wrote:

Dear list,


when running gwr() with given fit.points, it is not possible to 
calculate the hatmatrix. But it would be very helpful to get the 
fitting characteristics such as AIC or RMSE with the gwr output. In 
my case the fit points have to be set, as i run gwr on a cluster.

According to information from the authors, it seems that GWR3 fits 
without fit points first to generate a hat matrix for the data points. 
This is then used in a further step for the fit points, for which no 
covariates are observed. The assumption is that #data points << #fit 
points, as when making a raster. This may be done I think by doing the 
same, first running gwr() on the data points only and making the hat 
matrix, next fitting on the fit points and including the output of the 
first step in the fittedGWRobject= argument. However, the fitted 
object will only help in giving local R2 (GWR4 version), and local 
coefficient and prediction standard errors, not AIC.

Roger

I appreciate if anyone can help!

all the best,

Max