Set properties from Superclass in subclass

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elevonm
elevonm 2021-8-20
评论： Turlough Hughes 2021-8-20
Hello, I have defined a superclass 'food.m' that has certain properties:
classdef food
properties
vitamins
protein
carbs
end
end
Now I want to define a subclass that inherits from the above, and also sets the vitamins property (in other words, I will want all instances of this subclass to have the property 'Vitamins' set to "C")
classdef fruit < food
properties (Access = private)
vitamins = "C"
end
end
The following error is raised
%Cannot define property 'vitamins' in class 'fruit' because the property has already been defined in the
%superclass 'food'.
How do I fix this?
Thank you in advance for your help!

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Turlough Hughes
Turlough Hughes 2021-8-20
编辑：Turlough Hughes 2021-8-20
Set the Access attribute in the superclass:
classdef food
properties
protein
carbs
end
properties (Access = private)
vitamins
end
end
otherwise, the default is that vitamins is defined as a public property in the superclass.
You can get a list of default property attributes here.
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