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/*$Id: m_divdiff.h,v 26.81 2008/05/27 05:34:00 al Exp $ -*- C++ -*-
* Copyright (C) 2001 Albert Davis
* Author: Albert Davis <aldavis@gnu.org>
*
* This file is part of "Gnucap", the Gnu Circuit Analysis Package
*
* 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, 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*------------------------------------------------------------------
* divided differences
* in:
* c = numerator (data points) (lost)
* t = denominator (time)
* n = size of array
* # of divided differences == n-1
* out:
* c = "divided differences" (mult by n! to get derivative)
*/
//testing=script,complete 2006.07.13
/*--------------------------------------------------------------------------*/
#if 0
template<class T1, class T2>
inline void divided_differences(T1 c[], int n, const T2 t[])
{
untested();
for (int d=1; d<n; ++d) {
untested();
for (int i=n-1; i>=d; --i) {
untested();
c[i] = (c[i-1] - c[i]) / (t[i-d] - t[i]);
}
}
}
#endif
/*--------------------------------------------------------------------------*/
template<class T1, class T2>
inline void derivatives(T1 c[], int n, const T2 t[])
{
for (int d=1; d<n; ++d) {
for (int i=n-1; i>=d; --i) {
c[i] = d * (c[i-1] - c[i]) / (t[i-d] - t[i]);
}
}
}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
// vim:ts=8:sw=2:noet:
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