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Variogram outliers'

To: <s-news@lists.biostat.wustl.edu>
Subject: Variogram outliers'
From: Cristina Ortuño <cortuno@sma.df.gob.mx>
Date: Wed, 26 Feb 2003 20:18:22 -0600
Cc: <s-news-owner@lists.biostat.wustl.edu>
Importance: Normal
Reply-to: <cortuno@sma.df.gob.mx>
Dear user´s of S+SaptialStats v1.0 or 1.5 for Windows.

I'm working with S+plus 2000 r.3 for Windows, and i traying to fit a
variogram to a "PM2.5" data grid, but i have some outliers in the variogram
cloud, so when i removed a pair of them by the optional argument "subset",
and look again the variogram cloud, another outlier apperas, but it's
identified with the same number of ones that i remove before.
What happend with the order of my rows, is it re-order?

{example: one of my outliers is the pair (1,13) so i remove it by
subset=-c(1,13)
but in the new variogram cloud appears another outlier pair (7,13) }
Do i removing just the pair (1,13) or i'm removing the row 1 and row 13?
'cause i don't understand.

I'll appreciate your attention


Regards

Cristina Ortuño Mojica
Air Quality Monitoring Network in
Mexico City metropolitan area
Ministery of Environmental, Mexico City
Tel. (+52) 55-52099903 xt. 6225
Fax. (+52) 55-55111460
Jalapa #15, 2nd floor Col Roma
C.P. 06700 Mexico D. F.
Our Internet URL: http://www.sma.df.gob.mx/


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