R version 3.3.2 (2016-10-31) -- "Sincere Pumpkin Patch"
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> # fields, Tools for spatial data
> # Copyright 2004-2011, 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
Loading required package: grid
Spam version 1.4-0 (2016-08-29) is loaded.
Type 'help( Spam)' or 'demo( spam)' for a short introduction 
and overview of this package.
Help for individual functions is also obtained by adding the
suffix '.spam' to the function name, e.g. 'help( chol.spam)'.

Attaching package: 'spam'

The following objects are masked from 'package:base':

    backsolve, forwardsolve

Loading required package: maps
> options( echo=FALSE)
Warning: 
Grid searches over lambda (nugget and sill variances) with  minima at the endpoints: 
  (REML) Restricted maximum likelihood 
   minimum at  right endpoint  lambda  =  0.003053154 (eff. df= 14.25 )
Testing:   d coef diag W fixed lam
PASSED test at tolerance  1e-08
Testing:   d coef diag W
PASSED test at tolerance  1e-08
Testing:  c coef diag W fixed lam
PASSED test at tolerance  1e-08
Testing:  c coef  diag W 
PASSED test at tolerance  1e-08
Warning: 
Grid searches over lambda (nugget and sill variances) with  minima at the endpoints: 
  (REML) Restricted maximum likelihood 
   minimum at  right endpoint  lambda  =  0.002794267 (eff. df= 14.24999 )
Testing:   sqrt of W
PASSED test at tolerance  1e-08
Warning: 
Grid searches over lambda (nugget and sill variances) with  minima at the endpoints: 
  (REML) Restricted maximum likelihood 
   minimum at  right endpoint  lambda  =  0.002794267 (eff. df= 14.24999 )
Testing:   Test of passing W explicitly
PASSED test at tolerance  1e-08
Testing:   d coef full W
PASSED test at tolerance  1e-08
Testing:  c coef full W
PASSED test at tolerance  1e-08
Testing:  A matrix
PASSED test at tolerance  1e-08
Testing:   check trace of A
PASSED test at tolerance  1e-08
Testing:  GCV one
PASSED test at tolerance  5e-08
all done  testing off diag W case
> 
> proc.time()
   user  system elapsed 
  0.684   0.048   0.724