Graphics Object Programming

Comparing, testing for validity, preallocating, and object arrays

Functions

`gobjects`	Initialize array for graphics objects
`isgraphics`	True for valid graphics object handles
`isempty`	阻止mine whether array is empty
`isequal`	阻止mine array equality
`isa`	阻止mine if input is object of specified class

Use the object handle to set and query the values of the object properties.

Handle objects do not evaluate to logicaltrueorfalse. You must use the function that tests for the state of interest and returns a logical value.

Graphics arrays can contain the handles of any graphics objects.

Useisgraphicsto determine if a variable is a valid graphics object handle.

Use thegobjectsfunction to preallocate arrays for graphics objects.

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