#
# 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
n <- 5
m <- 4
mat <- array(rnorm(n*m),c(n,m))
mat2 <- array(rnorm(n*m),c(m,n))
vec <- rnorm(n)
vec2 <- rnorm(n)

test.for.zero( mat2 %*% mat, mat2%d*%mat, tol=1e-8 )

test.for.zero( (diag(vec)%*% mat), (vec%d*%mat), tol=1e-8 )


test.for.zero( diag(vec)%*% vec2, vec%d*%vec2,tol=1e-8)
cat("All done with testing diag multiply", fill=TRUE)
options(echo=TRUE)