Control checking of spatial object IDs
Provides support for checking the mutual integrity of spatial neighbour weights and spatial data; similar mechanisms are used for passing global verbose and zero.policy options, and for providing access to a running cluster for embarrassingly parallel tasks.
set.VerboseOption(check) get.VerboseOption() set.ZeroPolicyOption(check) get.ZeroPolicyOption() #set.listw_is_CsparseMatrix_Option(check) #get.listw_is_CsparseMatrix_Option()
check |
a logical value, TRUE or FALSE |
Analysis functions will have an spChk argument by default set to NULL, and will call get.spChkOption() to get the global spatial option for whether to check or not — this is initialised to FALSE, and consequently should not break anything. It can be changed to TRUE using set.spChkOption(TRUE), or the spChk argument can be assigned in analysis functions. spNamedVec() is provided to ensure that rownames are passed on to single columns taken from two-dimensional arrays and data frames.
set.spChkOption() returns the old logical value, get.spChkOption() returns the current logical value, and chkIDs() returns a logical value for the test lack of difference. spNamedVec() returns the selected column with the names set to the row names of the object from which it has been extracted.
Roger Bivand Roger.Bivand@nhh.no
get.VerboseOption() get.ZeroPolicyOption()
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