Implements the Reverse Jackknife procedure as described by Chapman (2005). Used in outliers.
values of an environmental variable extracted from points
This function is based on the Reverse Jackknife method described by Chapman (2005)
indices of values that are outliers
The implementation was based on Chapman (2005) and not the more conservative implementation in DivaGIS
Chapman, A.D. (2005) Principles and Methods of Data Cleaning - Primary Species and Species- Occurrence Data, version 1.0. Report for the Global Biodiversity Information Facility, Copenhagen.
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