Re: [real] Outliers of data

Don,

If the data is can be mapped as 2D or 3D Cartesian coordinates, you could
use spatial operators from PostGIS.

Rick



                     
                      Don Isgitt
                     
                      <djisgitt@soundenergy.c        To:       Robert Fitzpatrick <robert@webtent.com>
                     
                      om>                            cc:       PostgreSQL <pgsql-general@postgresql.org>
                     
                      Sent by:                       Subject:  Re: [real] [GENERAL] Outliers of data
                     
                      pgsql-general-owner@pos
                     
                      tgresql.org
                     

                     

                     
                      10/21/2004 01:55 PM
                     

                     

                     






Robert Fitzpatrick wrote:

>I have a project where it is necessary to determine Outliers of lab
>results and looking for some pointers on the best way to handle this
>type of calculation with PostgreSQL. Possibly an operator? I have no
>experience with that. I found some info on the web for calculating
>Outliers, here is one of them...
>
>http://cc.uoregon.edu/cnews/spring2000/outliers.html
>
>
>
Hi Robert,

You may want to consider the R language interface (pl/R); R (the
language) has great tools for detecting and operating on outliers.

Don


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