Parametric Curves
Curves, which are not determined by an explicit function term, but by two functions for the horizontal and vertical direction, can be plotted with this program.
Examples:
1. The Circle
x(k) = sin(k)
y(k) = cos(k)
k from -Pi to Pi
2. The Spirale
x(k) = k/8*sin(k)
y(k) = k/8*cos(k)
k from 0 to 20
3. The Lissajou figures
x(k) = sin(3*k)
y(k) = cos(5*k)
k from -Pi to Pi
Lissajou figures are obtained when two a-c voltages with different frequencies are applied to an oscilloscope.
See also:
Supported FunctionsSetting the graphics
Wikipedia: Parametric equation | Lissajous curve