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isvalid

Class: handle

Determine valid handles

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Syntax

B = isvalid(H)

Description

B = isvalid(H) returns a logical array in which each element is true if the corresponding element in H is a valid handle. A handle variable becomes invalid if the object has been deleted. Within a class delete method, isvalid always returns false.

You cannot override the isvalid method in handle subclasses.

Input Arguments

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Input array, specified as an array of object handles.

Output Arguments

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Result of validity test, returned as a logical array the same size as H in which each element is true if the corresponding element in H is a valid handle.

Attributes

Accesspublic
Sealedtrue

To learn about attributes of methods, see Method Attributes.

Examples

Test for Valid Handles

This example tests a handle array for valid members:

H = plot(rand(5));
delete(H(3:4))
B = isvalid(H)
B =

     1
     1
     0
     0
     1

Extended Capabilities

Thread-Based Environment
Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

See Also

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