how can i change varable in class automatically

Question

Zeyang Lei 2020-11-20

0
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https://ww2.mathworks.cn/matlabcentral/answers/654198-how-can-i-change-varable-in-class-automatically

回答： Prabhanjan Mentla 2020-11-26

i defined two classes:

class A has an attribute x

class B has an attribute y

for example:

ma=A(3);

mb=B(ma);

so now as defined above, ma.x=3, mb.y.x=3.

the question is, if i want to change ma.x to 6. like use code :ma.x=3. how can i let the mb.y.x change automatically to 6 too?

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Answer 1

Prabhanjan Mentla 2020-11-26

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在 MATLAB Online 中打开

Hi,

Here's the sample code of classA and classB. The main point here is change in the variable of one class reflected in both the classes.

classdef classA < matlab.mixin.Copyable
   properties
      x=0; 
   end
   methods
    function a = classA(x)
      a.x = x;
    end
   end
end

classdef classB < classA
   properties
      y=0;
   end
   methods
       function b = classB(x,y)
           b@classA(x);
           b.y = y;
        end
   end
end

>> a = classA(7);
>> b = classB(a,8)
b = 
  classB with properties:
    y: 8
    x: [1×1 classA]
>> b.x
ans = 
  classA with properties:
    x: 7
>> a.x=9
a = 
  classA with properties:
    x: 9
>> b.x
ans = 
  classA with properties:
    x: 9

You can try similar concepts to get work done and I would recommend you to check Object-Oriented Programming course get started with the Object-Oriented Concepts on MATLAB.

Hope this helps.