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Re: GEOSTATS: Ripley's K functions

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  • Roger Bivand
    ... One possibility is Splancs (Rowlingson, B. and Diggle, P. 1993 Splancs: spatial point pattern analysis code in S-Plus. Computers and Geosciences, 19,
    Message 1 of 3 , Mar 21, 2000
      On Tue, 21 Mar 2000, Martin BĂ©land wrote:

      > Hi,
      >
      > I am looking for a software to compute ripley's K univariate statistics
      > for determining if a pattern of point representing the location of trees
      > in a forest is random, uniform or aggregated. I also need to compute
      > ripley's bivariate statistic to determine if two groups of point (tree
      > species) are attracted or repulsed.
      >

      One possibility is Splancs (Rowlingson, B. and Diggle, P. 1993 Splancs:
      spatial point pattern analysis code in S-Plus. Computers and Geosciences,
      19, 627-655.) at:

      http://www.maths.lancs.ac.uk/~rowlings/Splancs/

      This is a library of functions for S-Plus, including both the ones you
      need. I have made a port for R (see http://cran.r-project.org) for
      Splancs:

      ftp://reclus.nhh.no/pub/R/splancs-2.01-1.tar.gz

      The "spatial" library by Venables and Ripley (the same Ripley), including
      the single pattern K measure, is part of the VR bundle for both S-Plus and
      R.

      Hope this helps,

      Roger

      --
      Roger Bivand
      Economic Geography Section, Department of Economics, Norwegian School of
      Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
      Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
      e-mail: Roger.Bivand@...
      and: Department of Geography and Regional Development, University of
      Gdansk, al. Mar. J. Pilsudskiego 46, PL-81 378 Gdynia, Poland.

      --
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    • Justin_Quirouette@pch.gc.ca
      Hello Martin, Have you considered the CrimeStat application available @ http://www.icpsr.umich.edu/NACJD/crimestat.html Hope this helps, Justin Justin
      Message 2 of 3 , Mar 21, 2000
        Hello Martin,

        Have you considered the CrimeStat application available @
        http://www.icpsr.umich.edu/NACJD/crimestat.html

        Hope this helps,
        Justin


        Justin Quirouette
        Regional GIS Specialist
        Parks Canada Agency - Ontario Service Centre








        Martin Bland <Martin.Beland@...> on 03/21/2000 10:17:51 AM

        Please respond to Martin.Beland@...



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        cc: (bcc: Justin Quirouette/Est-East/PCH/CA)



        Subject: GEOSTATS: Ripley's K functions
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