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+% Copyright The Numerical Algorithms Group Limited 1991.
+% Certain derivative-work portions Copyright (C) 1988 by Leslie Lamport.
+% All rights reserved
+
+% Title: 2-D Graphics
+
+%  Author: Clifton J. Williamson
+%  Date created: 3 November 1989
+%  Date last updated: 3 November 1989
+
+\begin{page}{ExPlot2DFunctions}{Plotting Functions of One Variable}
+\beginscroll
+To plot a function {\em y = f(x)}, you need only specify the function and the
+interval on which it is to be plotted.
+\graphpaste{draw(sin(tan(x)) - tan(sin(x)),x = 0..6)}
+\endscroll
+\autobuttons\end{page}
+
+\begin{page}{ExPlot2DParametric}{Plotting Parametric Curves}
+\beginscroll
+To plot a parametric curve defined by {\em x = f(t)},
+{\em y = g(t)}, specify the functions
+{\em f(t)} and {\em g(t)}
+as arguments of the function `curve', then give
+the interval over which {\em t} is to range.
+\graphpaste{draw(curve(9 * sin(3*t/4),8 * sin(t)),t = -4*\%pi..4*\%pi)}
+\endscroll
+\autobuttons\end{page}
+
+\begin{page}{ExPlot2DPolar}{Plotting Using Polar Coordinates}
+\beginscroll
+To plot the function {\em r = f(theta)} in polar coordinates,
+use the option {\em coordinates == polar}.
+As usual,
+call the function 'draw' and specify the function {\em f(theta)} and the
+interval over which {\em theta} is to range.
+\graphpaste{draw(sin(4*t/7),t = 0..14*\%pi,coordinates == polar)}
+\endscroll
+\autobuttons\end{page}
+
+\begin{page}{ExPlot2DAlgebraic}{Plotting Plane Algebraic Curves}
+\beginscroll
+\Language{} can also plot plane algebraic curves (i.e. curves defined by
+an equation {\em f(x,y) = 0}) provided that the curve is non-singular in the
+region to be sketched.
+Here's an example:
+\graphpaste{draw(y**2 + y - (x**3 - x) = 0, x, y, range == [-2..2,-2..1])}
+Here the region of the sketch is {\em -2 <= x <= 2, -2 <= y <= 1}.
+\endscroll
+\autobuttons\end{page}