Hi,
I am using the 'fields' package to conduct Kriging interpolation on my dataset. I have managed to generate the 3-dimensional surface plot of the Krige-fitted surface. There are several local minima points on the surface. My main interest is to pinpoint the exact x-y coordinates of the lowest response (elevation) point of each of the local minima points. Although an approximation is possible by generating predicted values using a regularly-spaced grids, such approximations are not good enough for my purposes. I have intentions to use the optim() and/or constrOptim() functions to locate the minima but I do not know what is the objective function to be optimized. Therefore, so far, I am still unable to do that. So, know how can I locate the local minima on a Krige-fitted surface? regards, Jeff Yeo _________________________________________________________________ Hotmail: Trusted email with powerful SPAM protection. https://signup.live.com/signup.aspx?id=60969 _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
