MATLAB: How to combine two objects of different subclasses into the property of another class

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Hello,

I explain the example so that it is better understood: I have a "board" class with a "player" attribute. This attribute is a list of different objects of the "human player" class. If I want to add to this list "player" objects of the class "player cpu" I get an error.

Best Answer

Your classes need to derive from the matlab.mixin.Heterogeneous class.

Specifically, your player class needs to derive from matlab.mixin.Heterogeneous. Then, as long as all your other player classes derive from your main player base class, you should be all set.

Check out this documentation page for more details: Designing Heterogeneous Class Hierarchies

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This behavior is supported by implementing the SUBSREF and SUBSASGN members for an object. These are invoked to handle the following cases:

A=MyClass(initial)
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out = A{I}
out = A.field
A(I) = in% Invoke A.SUBSASN(A,S,in)
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where S is a structure that describes the type of indexing.

More information about the SUBSASGN and SUBSREF commands can be found here:

https://www.mathworks.com/help/matlab/ref/subsasgn.html

https://www.mathworks.com/help/matlab/ref/subsref.html

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In general, you would have to write a copy() method specific to the needs of your class. The copy() method would have to call the class constructor with suitable arguments to generate a copy.

If your class is sufficiently simple that a copy can be made just by dot-indexing all of the non-Dependent, public property values and writing them to a second object,

   objcopy.prop1 = obj.prop1;
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   etc...

then you can just use my attached copyprops() utility, which automates this.

Best Answer

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