R/rdist.vec.R

Defines functions rdist.vec

Documented in rdist.vec

# fields  is a package for analysis of spatial data written for
# the R software environment .
# Copyright (C) 2018
# University Corporation for Atmospheric Research (UCAR)
# Contact: Douglas Nychka, nychka@ucar.edu,
# National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80307-3000
#
# 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    
rdist.vec = function(x1, x2) {
  #make sure inputs are matrices
  if (!is.matrix(x1)) {
    x1 <- as.matrix(x1)
  }
  if(!is.matrix(x2)) {
    x2 <- as.matrix(x2)
  }
  
  #return distances
  sqrt(rowSums((x1 - x2)^2))
}

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fields documentation built on June 25, 2021, 5:08 p.m.