/* Copyright (C) 1997-2001  Adrian Trapletti
  
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
  
   This library 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
   Library General Public License for more details.
  
   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

   Support functions for time series utilities */


void R_quad_map (double *x, double *xi, double *a, int *n)
{
  int i;

  x[0] = (*xi);
  for (i=1; i<(*n); i++)
    x[i] = (*a)*(1-x[i-1])*x[i-1];
}