#
# fields  is a package for analysis of spatial data written for
# the R software environment.
# Copyright (C) 2022 Colorado School of Mines
# 1500 Illinois St., Golden, CO 80401
# Contact: Douglas Nychka,  douglasnychka@gmail.edu,
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with the R software environment if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
# or see http://www.r-project.org/Licenses/GPL-2
##END HEADER
##END HEADER

suppressMessages(library(fields))
options( echo=FALSE)
set.seed( 234)
test.for.zero.flag<-1

y<- runif( 30)
lev<- sort(sample( 1:5,30, replace=TRUE))
w<- runif( 30)*.1+1
y<- as.matrix(y)

# compute by loop
hold<- rep( NA, 5)
for( k in 1:5){
  ind<- lev==k
  hold[k]<- sum( y[ind,]*w[ind])/ sum( w[ind])}

look<- fast.1way( lev, y, w)
test.for.zero( look$means, hold, tag="fast.1way means")

# now vectorized case

ytemp<- cbind( y, y-10, y+10)
look2<- fast.1way( lev, ytemp, w)
test.for.zero( look2$means[,2], hold-10, tag="fast.1way vectorized means")


cat("All done with testing misc functions", fill=TRUE)
options(echo=TRUE)