MATLAB: Is it possible to define the properties for a class using cell array

classproperty

For example, I have a cell array AA={'x' 'y' 'z'} obtained by reading external files such as Excel table. How can I define the properties x, y, z for a class by referring to AA or a function with output AA. Is this possible?

instead of:

classdef T

properties

end

I want something like:

classdef T

properties

AA's elements

end

Thanks…

Best Answer

Ycan have your class inherit from DynamicProps and this will allow you to add properties dynamically.

http://www.mathworks.com/help/releases/R2013b/matlab/matlab_oop/dynamic-properties--adding-properties-to-an-instance.html

C = {'x','y','z'};
D = exampleDynProp; %attached
for ii = 1:numel(C);addprop(D,C{ii});end
D

Related Solutions

MATLAB: Is calling a superclass constructor after a use of the object not allowed

I can only speculate as to why it would not be allowed, but I assume there are hazards in using an object that is not finished being constructed...like feeding a baby that is only half way through being born, or driving a car that’s only half assembled.

Below is how I would re-implement. In your original design, it doesn't make sense to me that the classB constructor should have to set x if it has already been set in classA.

classdef superclass
    
    %% PROPERTIES
    properties 
        x;
        y;
    end
    
end

classdef classA < superclass
    
    %% PROPERTIES
    properties
        a
    end
    
    properties (Access=private)
        z
    end
    
    %% METHODS
    methods
        % Constructor


        function obj = classA(a,z,y)
            obj.x = a*z;
            obj.a = a;
            obj.z = z;
            if nargin>2
             obj.y=y;   
            end
        end
    end
    
end

classdef classB < superclass
    
    %% PROPERTIES
    properties
        b
    end
    properties (Access=private)
        z
    end
    
    %% METHODS
    methods
        % Constructor
        function obj = classB(b,z,x)
            obj.y = z+b;
            obj.b = b;
            obj.z = z;
            if nargin>2
               obj.x=x; 
            end
        end
    end
    
end

classdef subclass < classA & classB
    
    %% METHODS
    methods
        % Constructor
        function obj = subclass(a,b,z)
            obj@classA(a,z);  %set x but not y
            obj@classB(b,z);  %set y but not x  
        end
    end
    
end

MATLAB: How to find the names of private dynamic properties in MATLAB 7.8 (R2009a)

The ability to retrieve the names of Private Dynamic properties is not available in MATLAB R2009a.

As the name suggests, dynamic properties are dynamically added so that means that at some point in time (when you actually add the property) the name should be known. Please make sure you do not lose track of the name at that point. A way to ensure this could be to write you own superclass which keeps track of the property names and derive your class from this class instead of from dynamicprops; an example of such a super class is given below:

classdef mydynamicprops < dynamicprops
      properties (Access=private)
          % In this private property we save the names of the dynamically
          % added properties
          dynpropnames
      end
      methods
          function y=addprop(obj,pname)
              % First add the property to the list of dynamic properties
              obj.dynpropnames{end+1} = pname;
              % Then call the addprop method of dynamicprops, which actually adds the dynamic property 
              y=addprop@dynamicprops(obj,pname);
          end
          function y=GetDynamicProperties(obj)
              % Return a list of dynamic properties
              y=obj.dynpropnames;
          end
      end
end

Best Answer

Related Solutions

MATLAB: Is calling a superclass constructor after a use of the object not allowed

MATLAB: How to find the names of private dynamic properties in MATLAB 7.8 (R2009a)

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