The annulus command creates a two-dimensional plot data object, which when displayed is an annulus of inner radius r1 and outer radius r2 centered at [x,y].

The plot data object produced by the annulus command can be used in a PLOT data structure, or displayed using the plots[display] command.

Remaining arguments are interpreted as options, which are specified as equations of the form option = value. For more information, see plottools and plot/options.

$\mathrm{with}\left(\mathrm{plottools}\right)\:$

$\mathrm{with}\left(\mathrm{plots}\right)\:$

$\mathrm{display}\left(\mathrm{annulus}\left(\right)\right)$

$\mathrm{display}\left(\mathrm{annulus}\left(\left[1\,1\right]\right)\right)$

$\mathrm{display}\left(\mathrm{annulus}\left(2..3\right)\right)$

$\mathrm{display}\left(\mathrm{annulus}\left(2..3\,\mathrm{color}=''Red''\right)\right)$

$\mathrm{display}\left(\mathrm{annulus}\left(\left[2\,2\right]\,\frac{1}{2}..2\,\mathrm{color}=''Green''\,\mathrm{style}='\mathrm{polygon}'\right)\right)$

The plottools[annulus] command was introduced in Maple 16.

For more information on Maple 16 changes, see Updates in Maple 16.