Hello,
Can we create inverse-distance spatial weighting matrices for point data?
I can create inverse-distance spatial weighting matrices with a polygon shapefile (poly.shp) by using the following commands.
spshape2dta poly.shp
use poly, clear
spmatrix create idistance Wid, normalize(row)
However, I cannot create spatial weighting matrices with a point shapefile (point.shp); for example,
spshape2dta point.shp
use point, clear
spmatrix create idistance Wid, normalize(row)
* Then, I get "coordinate variable _CX has missing values" error.
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