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help for numids
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Generating numeric identifiers for neighbours

        numids locivar locjvar , generate(numid1var numid2var)


Description 

    nunids converts spatial neighbourhood information of the form

        locivar locjvar
        ------- -------
        123      456
        678      901

    or of the form

        "TX"     "OK"
        "TX"     "NM"

    that is, using any numeric or string identifiers, into identifiers that
    are observation numbers 1, ..., _N. The order will be the sort order of
    locivar.


Remarks

    numids is a utility for users of spautoc.

    It is assumed that every pair of neighbours is recorded twice, once as i
    and j, once as j and i. If not, use dupneigh first.


Options

    generate(numid1var numid2var) specifies two new variables to contain
        numeric identifiers. It is a required option.


Examples

    . numids i j , gen(ni nj)


Author

    Nicholas J. Cox, Durham University, U.K.
    n.j.cox@durham.ac.uk


Also see

    On-line: help for spautoc, dupneigh, neigh