nbrfun.m

function h=nbrfun(netset,ds,ep)

% neighbor function 

% Directed Batch Growing Self Organizing Map (DBGSOM)
% version 1.0 - July 2017
% Mahdi Vasighi
% Institute for Advanced Studies in Basic Sciences, Zanjan, Iran
% Department of Computer Science and Information Technology
% www.iasbs.ac.ir/~vasighi/

%     Directed Batch Growing Self Organizing Map (DBGSOM), version 1.0
%     Copyright (C) 2017  Mahdi Vasighi
% 
%     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 3 of the License, or
%     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 this program.  If not, see <http://www.gnu.org/licenses/>.

lr=netset.lrvec(ep);

% l = netset.pvec(ep)-ds;
% l(l<0)=0;
% l(l>=0)=1;
% h = lr.*exp(-(ds.^2)/(2*netset.pvec(ep)^2)).*l;

nbr=(1-(ds./(netset.pvec(ep)+1)));
nbr(nbr<0)=0;
h = lr.*nbr;