## Copyright (C) 2004-2008  Carlo de Falco
  ##
  ## SECS1D - A 1-D Drift--Diffusion Semiconductor Device Simulator
  ##
  ##  SECS1D 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.
  ##
  ##  SECS1D 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 SECS1D; If not, see <http://www.gnu.org/licenses/>.     
##
## author: Carlo de Falco <cdf _AT_ users.sourceforge.net>
    
## -*- texinfo -*-
##
## @deftypefn {Function File}@
## {@var{m}} = Umediarmonica(@var{w})
##
## Return the harmonic mean value of @var{w}
##
## @end deftypefn
     
function m = Umediaarmonica(w);
     
  dw = (1./w(1:end-1))+(1./w(2:end));
  m  = 2 ./ dw; 
     
endfunction