Changes to progress.org.
Plot simple 2D functions on a linear range of x:\\
{\ex \lstinline| plot(f(x), (x, 0, 2*pi)|}
Plot 2D plots where x and y are functions of another variable:\\
{\ex \lstinline| parametric_plot((f_x, f_y), (x, 0, 2*pi), (y, 0, 2*pi))|}
Generate a sequence of points with a given seperation:\\
{\ex \lstinline| points = srange(2.5, 5.5, 0.25)|}
Plot a line joining a list of pairs of points:\\
{\ex \lstinline| line(list_pairs)|}
Show the plots:\\
{\ex \lstinline| show(plot_name)|}
Show multiple plots:\\
{\ex \lstinline| show(p1+p2+p3)|}
Set x-axis limits:\\
{\ex \lstinline| show(p1+p2, xmim=0, xmax=2*pi)|}
Set y-axis limits:\\
{\ex \lstinline| show(p1+p2, ymim=-1.2, ymax=1.2)|}
Plot 3D functions:\\
{\ex \lstinline| plot3d(f(x, y), (x, 0, 2*pi), (y, -1, 1))|}
Plot 3D functions where x, y, z are functions of another variable:\\
{\ex \lstinline| parametric_plot3d((f_x, f_y, f_z), (t, 0, 10))|}