c Copyright (C) 2008 VZLU Prague, a.s., Czech Republic c c Author: Jaroslav Hajek <highegg@gmail.com> c c This file is part of OctGPR. c c OctGPR is free software; you can redistribute it and/or modify c it under the terms of the GNU General Public License as published by c the Free Software Foundation; either version 3 of the License, or c (at your option) any later version. c c This program is distributed in the hope that it will be useful, c but WITHOUT ANY WARRANTY; without even the implied warranty of c MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the c GNU General Public License for more details. c c You should have received a copy of the GNU General Public License c along with this software; see the file COPYING. If not, see c <http://www.gnu.org/licenses/>. c double precision function dsumsq(n,x,incx) c purpose: an assistant function. Computes a sum of squares c of the components of a vector x. This is separated c to allow possibly more precise computation in the c future. c arguments: c n (in) length of x c x (in) vectors in question c incx (in) increment integer n,incx real*8 x(*) integer i dsumsq = 0d0 if (incx == 1) then do i = 1,n dsumsq = dsumsq + x(i)**2 end do else do i = 1,n*incx,incx dsumsq = dsumsq + x(i)**2 end do end if end function

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