name  value type  description

lower_c1  floatingpoint value  The coefficient of the
lower function y(x) at x*x

lower_c2  floatingpoint value  The coefficient of the
lower function y(x) at x

lower_c3  floatingpoint value  The coefficient of the
lower function y(x) at 1

upper_c1  floatingpoint value  The coefficient of the
upper function y+(x) at x*x

upper_c2  floatingpoint value  The coefficient of the
upper function y+(x) at x

upper_c3  floatingpoint value  The coefficient of the
upper function y+(x) at 1

left_x  floatingpoint value  The leftmost X coordinate
to be displayed

right_x  floatingpoint value  The rightmost X coordinate
to be displayed

color_upr  RGB color value of the form #rrggbb where rr, gg,
bb are the red, green, and blue color components in hexadecimal  The
color of the upper quadratic function

color_lwr  RGB color value  The color of the lower
quadratic function

color_uprapprox  RGB color value  The color of the upper
approximator function

color_lwrapprox  RGB color value  The color of the lower
approximator function

color_other  RGB color value  The color of parts of the
graph not representing a function, such as the axes

bgcolor  RGB color value  The background color of the drawing area

canvas_width  integer  The width of the drawing canvas on
which the functions will be drawn

canvas_height  integer  The height of the drawing canvas
on which the functions will be drawn

show_quad  flag  If set, specifies that the quadratic
functions should be shown on startup

show_approx  flag  If set, specifies that the approximator
functions should be shown on startup"}};
