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R2013a

5-8

Changes to subclasses of built-in classes

Subclasses of built-in classes no longer inherit the following methods:

• ones

• zeros

• true

• false

• cast

As a result of this change, you cannot call these methods with an object of a built-in

subclass. For example, given a class, mySubclassOfDouble, that derives from double,

the following attempt to call cast results in an error:

a = mySubclassOfDouble(1); % constructor

b = a.cast('int8'); % ok in R2012b but errors in R2013a

However, you can call the corresponding built-in functions with objects of the subclass.

Use the function syntax instead of the method dot notation syntax:

b = cast(a,'int8');

Compatibility Considerations

Change code that attempts to call these methods to call the built-in function instead. Use

function syntax instead of dot notation, as described in the previous section.

Conversion of error and warning message identifiers

For R2013a, error and warning message identifiers have changed in MATLAB.

Compatibility Considerations

If you have scripts or functions that use message identifiers that changed, you must

update the code to use the new identifiers. Typically, message identifiers are used to turn

off specific warning messages, or in code that uses a try/catch statement and performs an

action based on a specific error identifier.

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