R version 2.11.1 (2010-05-31)
Copyright (C) 2010 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> # fields, Tools for spatial data
> # Copyright 2004-2007, Institute for Mathematics Applied Geosciences
> # University Corporation for Atmospheric Research
> # Licensed under the GPL -- www.gpl.org/licenses/gpl.html
> 
> 
> library( fields)
Loading required package: spam
Package 'spam' is loaded. Spam version 0.15-5 (2009-08-08).
Type demo( spam) for some demos, help( Spam) for an overview
of this package.
Help for individual functions is optained byadding the
suffix '.spam' to the function name, e.g. 'help(chol.spam)'.

Attaching package: 'spam'

The following object(s) are masked from 'package:base':

    backsolve, forwardsolve, norm

 Use help(fields) for an overview of this library

library( fields, keep.source=TRUE) retains comments in the source code. 
> 
> # tests of predict.se
> # against direct linear algebra 
> 
> options( echo=FALSE)
testing:  Amatrix vs. predict
    PASSED test at tolerance  1e-08
testing:  Marginal predict.se
    PASSED test at tolerance  1e-08
testing:  Marginal predict.se fixed 
    PASSED test at tolerance  1e-08
testing:  Full covariance predict.se
    PASSED test at tolerance  1e-08
testing:  Marginal standard Cond. Sim.
    PASSED test at tolerance  0.01
testing:  Full covariance standard Cond. Sim.
    PASSED test at tolerance  0.02
testing:  Amatrix vs. predict
    PASSED test at tolerance  1e-08
testing:  Weighted case and exact for ozone2 full 
cov
    PASSED test at tolerance  1e-08
testing:  Conditional simulation marginal se for grid
    PASSED test at tolerance  0.001
all done testing predict.se 
>