question on spatial bootstrap /Jackknife ......etc
Dear zhijie,
zhijie zhang wrote:
Dear firends, I have two questions about spatial statistics: 1. As we all know ,we can calculate Moran's I to evaluate the spatial autocorrelation and we can also visually assess the spatial autocorrelation through the Variogram in Geostatistics, Now my curiosity is what is the difference between the two methods? Is there any relationships between them? I am confused by them recently?
In simple terms, Moran's I is used with lattice data and variograms are used for geostatistical data. In a nutshell it all depends on what type of data you are working with and the assumptions that you ought to comply. On regards of the relationships and differences of the methods I would recommend you to look for some books on "Applied Spatial Statistics" in your library.
2. How to perform spatial bootstrap /Jackknife in R? which package can be used?
I know that the package gstat in R does leave-one-out crossvalidation kriging (krige.cv), this may be what you are looking for in terms of the jackknife. Edzer may correct me on this one... Good luck, Jose
Any suggestions are welcome. Thanks in advance! -- Kind Regards,Zhi Jie,Zhang ,PHDDepartment of EpidemiologySchool of Public HealthFudan UniversityTel:86-21-54237149 [[alternative HTML version deleted]]
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