*! version 1.0.4 24jan2012
help spmatalso see: spreg
spivreg

Title

spmat -- Create and manage spatial-weighting matrix objects
(spmat objects)

Syntax

spmat subcommand ... [, ...]

subcommand

contiguity create an spmat object containing a contiguity
matrix W

idistance create an spmat object containing an
inverse-distance matrix W

summarize summarize an spmat object

note manipulate a note attached to an spmat object

graph draw an intensity plot of W

lag create a spatially lagged variable

eigenvalues add eigenvalues of W to an spmat object

drop drop an spmat object from memory

save save an spmat object to disk in Stata's native format

export save an spmat object to disk as a text file

getmatrix copy a matrix from an spmat object to a Mata matrix

use create an spmat object from a file created by
spmat save

import create an spmat object from a text file

dta create an spmat object from a Stata dataset

putmatrix put a Mata matrix into an spmat object

permute permute rows and columns of W

tobanded transform an n x n W into a
banded b x n W

Description

Spatial-weighting matrices are used to model interactions between spatial
units in a dataset. spmat is a collection of commands for creating,
importing, manipulating, and saving spatial-weighting matrices.

Spatial-weighting matrices are stored in spatial-weighting matrix objects
(spmat objects). spmat objects contain additional information
about the data used in constructing spatial-weighting matrices. spmat
objects are used in fitting spatial models; see spreg, spivreg
(if installed).

These commands are documented in Drukker, Peng, Prucha, and Raciborski
(2011) which can be downloaded from
http://econweb.umd.edu/~prucha/Papers/WP_spmat_2011.pdf.

References

Drukker, D. M., H. Peng, I. R. Prucha, and R. Raciborski. 2011.
Creating and managing spatial-weighting matrices using the spmat command.
Working paper, The University of Maryland, Department of Economics,
http://econweb.umd.edu/~prucha/Papers/WP_spmat_2011.pdf.

Authors

David Drukker, StataCorp, College Station, TX.
ddrukker@stata.com.

Hua Peng, StataCorp, College Station, TX.
hpeng@stata.com.

Ingmar Prucha, Department of Economics, University of Maryland, College Park, MD.
prucha@econ.umd.edu.

Rafal Raciborski, StataCorp, College Station, TX.
rraciborski@stata.com.

Also see

Online: spreg, spivreg,
spmap, shp2dta, mif2dta (if installed)