NEARSTAT: Stata module to calculate distance-based variables and export distance matrix to text file

P. Wilner Jeanty ()

Statistical Software Components from Boston College Department of Economics

Abstract: Using Mata, Stata's new matrix language, nearstat calculates distances, generates distance-based variables, and exports the distances to a Stata matrix, a Mata file, or a text file. To generate the variables, nearstat performs, for each observation in a Stata dataset, a series of computational tasks including, but not limited to, calculating distance-weighted descriptive statistics over all neighbors, nearest neighbors, and neighbors falling in a specified distance band; calculating distance to nearest neighbors; counting the number of neighbors falling in a specified distance band; and determining whether a specified (e.g., first, second, third,...) nearest neighbor falls within a certain distance band. Distance is calculated as the Great Circle or crow-fly distance depending on whether spherical or Cartesian coordinates are supplied to nearstat.

Language: Stata
Requires: Stata version 10.1
Keywords: spatial data; nearest neighbors; Great Circle distance; spherical coordinates (search for similar items in EconPapers)
Date: 2010-01-26, Revised 2012-02-07
Note: This module should be installed from within Stata by typing "ssc install nearstat". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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Citations: View citations in EconPapers (5)

Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/n/nearstat.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/n/nearstat.mata program code (text/plain)
http://fmwww.bc.edu/repec/bocode/l/lnearstat.mlib Mata object library (application/x-stata)
http://fmwww.bc.edu/repec/bocode/n/nearstat.sthlp help file (text/plain)

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