MATLAB: OOP: Object gone out of scope!

oop classes access properties

Hi,
I have two handle classes.
In one of them I call the constructor of the other handle class many times.
Problem: Upon entering the constructor of the other class, the object of the first class is gone and I can't access it's properties unless I define an instance of the first class…
Must I pass the object of the first class to the other class or is there another way of doing this?
Class1
 def Class1 < handle
   properties (Constant)
     f = 1:2:20 
     g = 1:3:30
   end
   properties
     a_Class1
     b_Class1
     c_Class1
   end
   methods
      function obj = Class1(a,b,c)
        obj.a_Class1 = a;
        obj.b_Class1 = b;
        obj.c_Class1 = c;
        for k = 1:10
           x(k) = Class2(k,f(k),g(k))
        end
      end 
   end
 end
The values for a,b and c are user-specific values…
I need to access the values a,b and c in Class_2 without having to pass the whole object of Class1 to Class2…
The properties a_Class1, b_Class1 and c_Class1 are the same for both classes …
Thank you for your advice!

Best Answer

This is expected. x is a local variable to the constructor, so it will go out of scope after instantiating the object.
You have two options:
  • Declare x as a property of Class1
  • Use functions such as assignin or evalin to stick x into the MATLAB base workspace (or the function where the Class1 object is instantiated)
I'd strongly recommend going with the first option.
- Sebastian
Related Question