classes and the "set" method

Hi,

I am trying to write a class in Matlab and I am new to it, sorry that I probably don't use the correct terminology. In a basic example, I would like to have data structured in this way:

classdef DummyBasic
properties
        av = 1;
    end
    methods 
    end
end

and

classdef Dummy
    properties
        X = 0;
        a = DummyBasic;
    end
    methods
    end
end

Now, I would like to change X whenever a.av is changed. I guess it would be easy to do if a rearranged the properties X and av to a single class. But is it possible to somehow keep this structure (I am using Matlab2015b)?

Any help appreciated.

Answer 1

[Steven Lord]

Make X a Dependent property in class Dummy and make its get.X method compute the value of X using the current value of the av property. In the example on that documentation page X would behave like the Balance property while av would fill the role of the Currency and DollarAmount properties.

While I don't think this documentation page has changed significantly since release R2015b, if you want to be sure search your locally-installed documentation for "dependent property" and refer to the information on the release R2015b version of this page.

[kk]

Thank you, this is very helpful, I can now see how the structuring in Matlab works. Because I also want to store data in X, I decided it would be easier for me to define a function setAv() in the Dummy class, which will set the a.av and recalculate the X, instead of directly changing the a.av.