[R-sig-Geo] FW: Interpolcation option: IDW or OK?

2009-02-08 Thread Yong Li
Hi Edzer, I would say the spatial structure is regarded not significant when c0/c0+c1 is very much greater than 75%. In my case I used even distance intervals and calculated c0/c0+c1 for log(OLSENP) greater than 85%. I knew this index sometimes is very fragile, very much depending on how we fit

Re: [R-sig-Geo] Interpolcation option: IDW or OK?

2009-02-08 Thread Edzer Pebesma
Yong Li wrote: Hi ALL, I have been with the attached dataset and R code to use OK to interpolate soil OLSEN P spatial distribution for a couple of weeks. So far I have not found a satisfactory solution using OK or local OK or block OK, compared to IDW method. However theoretically OK is always b