https://github.com/cran/fields
Tip revision: 253d8b5b20937dcd8ee0196c81699414b6ddbfd2 authored by Douglas Nychka on 05 May 2016, 23:56:26 UTC
version 8.4-1
version 8.4-1
Tip revision: 253d8b5
cvrf.f
c fields, Tools for spatial data
c Copyright 2015, Institute for Mathematics Applied Geosciences
c University Corporation for Atmospheric Research
c Licensed under the GPL -- www.gpl.org/licenses/gpl.html
c** finds value of h minimizing the generalized cross-validation
subroutine cvrf
* (h,nobs,x,y,wt,sy,trace,diag,din,dout,cv,ierr)
implicit double precision (a-h,o-z)
REAL*8 h,trace,cv
REAL*8 x(nobs),y(nobs),wt(nobs)
REAL*8 sy(nobs),diag(nobs),dumm1(1),dumm2(1)
real*8 din(10), dout(10)
integer ngrid, ierr, job(3),ideriv
data job/3,0,0/
data ideriv,ngrid/0,1/
call rcss(h,nobs,x,y,wt,sy,trace,diag,cv,
+ ngrid,dumm1,dumm2,job,ideriv,din,dout,ierr)
nit= int( dout(1))
trace=dout(3)
c
return
end