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

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Author Info

  • P. Wilner Jeanty

    ()
    (The Kinder Institute for Urban Research/Hobby Center for the Study of Texas, Rice University)

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.

Download Info

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File URL: http://fmwww.bc.edu/repec/bocode/n/nearstat.ado
File Function: program code
Download Restriction: no

File URL: http://fmwww.bc.edu/repec/bocode/n/nearstat.mata
File Function: program code
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File URL: http://fmwww.bc.edu/repec/bocode/l/lnearstat.mlib
File Function: Mata object library
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File URL: http://fmwww.bc.edu/repec/bocode/n/nearstat.sthlp
File Function: help file
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Bibliographic Info

Software component provided by Boston College Department of Economics in its series Statistical Software Components with number S457110.

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Programming language: Stata
Requires: Stata version 10.1
Date of creation: 26 Jan 2010
Date of revision: 07 Feb 2012
Handle: RePEc:boc:bocode:s457110

Note: This module should be installed from within Stata by typing "ssc install nearstat". Windows users should not attempt to download these files with a web browser.
Contact details of provider:
Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA
Phone: 617-552-3670
Fax: +1-617-552-2308
Email:
Web page: http://fmwww.bc.edu/EC/
More information through EDIRC

Order Information:
Web: http://repec.org/docs/ssc.php

Related research

Keywords: spatial data; nearest neighbors; Great Circle distance; spherical coordinates;

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