Dear friends,
 I met two problems in spdep package and hope to get help.

1. "*coords* :matrix of point coordinates " appeared in spdep package for
several times,but i can't find how to generate it, could anybody tell me how
to generate the argument "* coords*",
 e.g. tri2nb(*coords*, row.names = NULL)

2.  In "write.nb.gal:Write a neighbours list as a GAL *lattice* file, may
also use newer GeoDa header format" , it refered the definition of lattice
data. Frankly speaking, i'm not very clear about the difference of grid data
and lattice data. Anybody who have a clear understanding about them give me
a brief


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Kind Regards

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