Access to class members

Hi guys,

I am having some problem in accessing the class members of one class to another class. I have checked in matlab documentation but i didn#t understood it weel. Could anyone help me in understanding it.

classdef clcore
    properties(GetAccess=?clMec)
       cpc
       csc 
    end
    properties(Dependent, GetAccess=?clMec)
        ws
    end
    methods(GetAccess=?clMec)
        function ws=get.ws(obj)
           ws=obj.cpc+obj.csc; 
            
        end
    end
end
classdef clMec
    properties 
        Mecmode
    end
   methods
       %
   end
end

and in command window

objcore=clcore(1,2)

I knew the way i have done is wrong but my context is this. Could anyone explain me how to use this getaccess.

thankyou.

[Rik]

I'm on mobile so I can't test your code, but it looks like a constructor is missing.

[kanuri venkata mohana]

Hi,

Could anyone explain me this?

Thankyou

[Deepak Gupta]

You have multiple classes in one file. In matlab, one class can be defined in one file.

I don't understand what is 'GetAccess=?' in your class.

When you are creating an object of the class, you are passing some arguments but your class doesn't have any constructors to handle these arguments.

[Walter Roberson]

You do not appear to have a method named the same thing as your class, so you do not have any constructor for your classes. You also have no static methods for your classes, so you cannot be using the class as a framework to hold static methods. There is therefore no way to construct a member of your class, or to use any method in your class.

[kanuri venkata mohana]

Thankyou for your reply Deepak. The way which i mentioned in the program can be used to use the objects directly withoutyout making subclass or superclass.

[kanuri venkata mohana]

Thankyou fo your reply Walter. Could you please how can i make it in a correct way or may be some hints which i can work with.

Thnakyou

[Steven Lord]

Show us a small example that is complete that shows the problem. We should be able to execute the example using your exact reproduction steps. This will help us understand where you're having difficulty.

Answer 1

[per isakson]

The Code Analyzer is a useful feature. It indicates syntax errors in the rightmost column of the editor. And it provides tooltips. Properties has the attribute GetAccess, but methods only has Access. IMO: one should try to keep the little box green at all times.

Your classes are value classes. Is that your intention? See Comparison of Handle and Value Classes

This is one way of "accessing the class members of one class to another class"

>> objcore=clcore(1,2)
objcore = 
  clcore with no properties.    % <<< private properties are not shown
>> objMec = clMec
objMec = 
  clMec with properties:

    Mecmode: []
>> objMec = objMec.access_value_of( objcore )
objMec = 
  clMec with properties:

    Mecmode: 3
>> 

where

classdef clMec
    properties 
        Mecmode
    end
   methods
       function     obj = access_value_of( obj, friend )
            obj.Mecmode = friend.ws;
       end
   end
end

and

classdef clcore
    properties(GetAccess=?clMec)
       cpc
       csc 
    end
    properties(Dependent, GetAccess=?clMec)
        ws
    end
    methods  
        function    obj = clcore( arg1, arg2 )   
            obj.cpc = arg1;
            obj.csc = arg2;
        end
        function    ws = get.ws(obj)
           ws=obj.cpc+obj.csc; 
        end
    end
end

[kanuri venkata mohana]

Hi Isakson,

The answer which you gave me for Access to class members was helpful. Is it possible for you to give me a solution if there is a subclass for clMec for example clEEC and the properties are are used from clcore. Could you please tell me how to do that.

Thankyou

[per isakson]

"a solution if there is a subclass for clMec for example clEEC" I'm not sure what kind of solution you are looking for.

Did you understand the code I provided in my answer? Do you think that this code is an answer to your original question? Exactly the same solution can be applied to "a subclass for clMec".

Please, try to elabotate a bit on what kind of solution you want.

[kanuri venkata mohana]

Thankyou for your reply. My requirement is I have a class called clCore which has geometrical parameters then I have a subclass called clcoreconstruction Which chooses which geometry have to be done,then there are 2 subclasses for clcoreconstruction name cluucore cluicore. In these classes geometries have to be done.What I have to do is I need to access the parameters from clCore make a switch case in clconstruction whether I need cluucore or cluicore. I could solve this with superclass subclass concept but I couldn’t do it with getaccess. Iam a bit confused in solving this. So if you could add 2 child classes in clMec and make a switch case in between them I think it will be helpful. I have a lot of inheritance in my programming so I think I could solve them. Thankyou