NAME

       henbif - plot a bifurcation diagram for the Henon system

SYNOPSIS

       henbif -help
         or
       henbif [-width  integer] [-height integer] [-skip integer]
              [-abmin double] [-abmax double] [-ab]  [-A  double]
              [-B  double] [-factor double] [-ymin double] [-ymax
              double] [-box integer] [-brmin double] [-brmax dou-
              ble]  [-bymin  double] [-bymax double] [-inv] [-mag
              integer] [-term string]

DESCRIPTION

       A bifurcation  diagram  of  the  Henon  system,  which  is
       described  by the equation x(t+1) = A - x(t)^2 + B * x(t -
       1), is plotted  according  to  the  specified  parameters.
       Either  of  the  parameters  (A or B) can be varied in the
       plot.

OPTIONS

       -width integer
              Width of the plot in pixels.

       -height integer
              Height of the plot in pixels.

       -skip integer
              Number of initial points to skip.

       -abmin double
              Smallest value for A (or B).

       -abmax double
              Largest value for A (or B).

       -ab    If TRUE, plot for A; B otherwise.

       -A double
              Value of the A parameter.

       -B double
              Value of the B parameter.

       -factor double
              Multiplicative factor for iterates.

       -ymin double
              Smallest value for y range.

       -ymax double
              Largest value for y range.


       -box integer
              Line width for a box.

       -brmin double
              Smallest r-value for the box.

       -brmax double
              Largest r-value for the box.

       -bymin double
              Smallest value for box y range.

       -bymax double
              Largest value for box y range.

       -inv   Invert all colors?

       -mag integer
              Magnification factor.

       -term string
              How to plot points.

BUGS

       No sanity checks are performed to make sure  that  any  of
       the options make sense.

AUTHOR

       Copyright (c) 1997, Gary William Flake.

       Permission  granted  for any use according to the standard
       GNU ``copyleft'' agreement provided that the author's com-
       ments  are  neither  modified nor removed.  No warranty is
       given or implied.