generate 2-D plot object for an annulus
annulus([x, y], r1..r2, options)
(optional) center of the annulus; default is [0,0]
(optional) inner and outer radius of the annulus; default is 1..2
(optional) equations of the form option=value. For a complete list, see plot/options.
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.
The plottools[annulus] command was introduced in Maple 16.
For more information on Maple 16 changes, see Updates in Maple 16.
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