Undefined operator '>' for input arguments of type 'BasicClass'

Hey, I want to write a simple class that will calculate recursive some values. Then, when I want to call my function, I got the report: Undefined operator '>' for input arguments of type 'BasicClass' Any ideas how can I repair this? I'm pretty new with the object oriented programming...

classdef BasicClass

   properties

      Value

   end

   methods   

       function [Result] = r (Value) 
        if Value > 0
        Result = r(Value - 1) * 1000+2;
        else
        Result =2;
        end
     end
   end
end

Answer 1

[Steven Lord]

The input argument to the r method of the BasicClass class will be an instance of BasicClass. You will need to access the property of that object explicitly; there's no implicit "Because this identifier matches the name of a property, we'll use the value of that property on the instance of the class in this method" behavior.

While you could make a new BasicClass object to perform the recursive call to the r method, I would instead use a class-related function that is not a method to do that recursion. Put all of the next block of code into a file named BasicClass.m.

classdef BasicClass
   properties
      Value
   end
   methods   
       function [Result] = r (myobj) 
         Result = recurseComputeR(myobj.Value);
     end
   end
end

function Result = recurseComputeR(myobjValue)
if myobjValue > 0
  Result = recurseComputeR(myobjValue-1)*1000+2;
else
  Result = 2;
end
end

Use this class like:

obj = BasicClass;
obj.Value = 2;
answer = r(obj)

You should receive 2002002 in the variable answer.

Answer 2

[Maciej Satora]

Thank You sir! It helped a lot. Is it like creating a function that is reference to another one?