Maple 9 Learning Guide - Maplesoft

106 • Chapter 5: PlottingParametric PlotsYou cannot specify some graphs explicitly. In other words, you cannotwrite the dependent variable as a function, y = f(x). For example, on acircle most x values correspond to two y values. One solution is to makeboth the x-coordinate and the y-coordinate functions of some parameter,for example, t. The graph generated from these functions is called aparametric plot. Use this syntax to specify parametric plots.plot( [ x-expr, y-expr, parameter=range ] )Plot a list containing the x-expr, the y-expr, and the name and range ofthe parameter. For example> plot( [ t^2, t^3, t=-1..1 ] );10.500.2 0.4 0.6 0.8 1–0.5–1The points (cos t, sin t) lie on a circle.> plot( [ cos(t), sin(t), t=0..2*Pi ] );10.5–1 –0.5 0.5 1–0.5–1The above plot resembles an ellipse because Maple, by default, scalesthe plot to fit the window. Here is the same plot again but with