MATLAB: Create superclass objects in a for loop

classconstructorsuperclass

 classdef SimulationAlgorithm < AgentAlgorithm
    %Paremeters that can only set by constructor
    properties(GetAccess = 'public', SetAccess = 'immutable')
        NbofAlliedAgents;
        NbofEnemyAgents;
        TotalSimTime;
    end     
    methods
        %Constructor for Simulation Algorithm
        function Sim = SimulationAlgorithm(N, M, T)
            Sim.NbofAlliedAgents = N;
            Sim.NbofEnemyAgents = M;
            Sim.TotalSimTime = T;     
            %Creates Agents via AlliedAgent SuperClass
            AlliedStates = Sim.CreateRandomStates(Sim, ...
                Sim.NbofAlliedAgents, 'Allied');
            EnemyStates = Sim.CreateRandomStates(Sim,...
                Sim.NbofEnemyAgents, 'Enemy');
            for i=1:Sim.NbofAlliedAgents
                AlliedAgents(i) = AlliedAgents(i)@AgentAlgorithm(AlliedStates(i,:));
            end
         end
    end
    %These methods can be invoked w/o an object initalized, Obj needs to
    %be send as parameter as a result
    methods (Static, Access = 'private')
        %Creates [x y z Vx Vy Vz] vector for all NbofAgents. Distinguishes
        %Allied vs Enemy agents via Type parameter.
        function [Vector] = CreateRandomStates(Obj, NbofAgents, Type)
       %SIMPLIFIED VERSION NOT REAL ONE            
            Vector = randi([1 100], [NbofAgents 6]);
        end
    end
 end

How can I call superclass constructor in a for loop. The nb. of the objects of AgentAlgorithm varies. In current state, it always says superclass constructor should be top state.

Best Answer

I restarted matlab, everything works fine, :D

Related Solutions

MATLAB: Preserve the methods of an object after it is updated

In your method AgentUpdate, don't use Obj. Just use AAA directly. Again, the way you wrote it now, Obj is a struct and when you do AAA=Obj at the end, your AAA becomes a struct.

function AgentUpdate(Agent, NewState, NewDetections)
    %Create last state Batch
    NewBatch = Agent.CreateBatch(Agent.Detections,...
                  Agent.Tracks, Agent.State);
      %If Batch is empty (Not initilized yet)
      if isempty(Agent.Batch(1).State)
          Agent.Batch = NewBatch;
      else
          Agent.Batch = [NewBatch Agent.Batch];
      end
      %Update with new parameters
      Agent.State = NewState;
      Agent.Detections = NewDetections; 
  end

In addition, because AgentAlgorithm is a handle class, in your definition of the method, you don't have to put Agent as the output.

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

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