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Re: GEOSTATS: Non-parametrics

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  • Chaosheng Zhang
    Hi, Eduardo Videla, Perhaps you may try power transformation for the datasets, such as Box-Cox. Chaosheng Zhang ... Dr. Chaosheng Zhang Division of
    Message 1 of 2 , Mar 10, 1997
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      Hi, Eduardo Videla,

      Perhaps you may try power transformation for the datasets, such as Box-Cox.

      Chaosheng Zhang


      >Hi,
      >
      >I would like some advise on any available software for doing non-parametric
      >statistics
      >(or better geostatistics, Henley 1981) on large, very large datasets.
      >
      >These datasets comprises multivariate spatial data, in 3D space from
      >severeal gold mines
      >in a region in the form
      >
      >X, Y ,Z, Au, As, Sb, Rock-type
      >
      >I would like to do an analysis of spatial autocorrelation within mines,
      >between mines and an analysis of their cross-correlation, i.e., to test the
      >hypothesis that one of the datasets is related or not to the rest.
      >
      >I realise that the lognormal transformation is very close to the observed
      >distribution, mainly in gold, but it still yields a lot of "almost
      >lognormal", thats why I want to use distribution-free statistics and test
      >of hypotheses.
      >
      >The problem is the size of the database, some times many thousands of
      >observations and the ability of the softwares to handle it
      >
      >Suggestions welcomed. Many thanks
      >
      >***********************************************
      >Eduardo Videla
      >Key Centre-Geology Dept.-Un. of Western Australia
      >E-mail: evidela@...
      >
      Dr. Chaosheng Zhang
      Division of Geochemistry
      Geological Survey of Sweden, SGU
      P.O. Box 670
      S-751 28 Uppsalla
      SWEDEN
      Tel: +46 18 179290
      Fax: +46 18 179210
      E-mail: chaosheng.zhang@...

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