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rfsim problem

To: s-news@lists.biostat.wustl.edu
Subject: rfsim problem
From: john walter <jfwalter@vims.edu>
Date: Wed, 31 Mar 2004 18:47:54 -0500
please disregard the previous message. Like when I call the mechanic to fix my broken car, only to find out that the battery wires aren't connected, I found a programming error that caused the problem.


I have a problem with the SPLUS spatial stat function rfsim where when I create data sets larger than 10x10 or 100 data points, the function induces a trend in the simulated data. Simulated data values in the lower left of the created data set slope down to low values, resulting in a situation where the data set no longer possess a variogram resembling the one that created it. Does anyone know if this is a problem within rfsim or whether this is a numerical problem with the LU decomposition of the covariance matrix? Either way is there a better way to create a spatially autocorrelated dataset larger than 10x10? Thanks

John


John Walter
Virginia Institute of Marine Science
P.O. Box 1346
Gloucester Point, VA 23062
(804) 684-7316
jfwalter@vims.edu

John Walter
Virginia Institute of Marine Science
P.O. Box 1346
Gloucester Point, VA 23062
(804) 684-7316
jfwalter@vims.edu
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