MATLAB: Passing an object from a method function to another function

class function methods objects

I'm having trouble passing an object from a method function to another function.
I want to pass the obj.federaltax and obj.provincialTax to my calc_totalTax func to calcluate the totalTax but all i'm getting is an empty value for totalTax.
classdef calcTax
   properties
       income = input('enter annual income: ');
       federalTax;
       provincialTax;
       totalTax;
   end
   
       function obj = calc_federalTax(obj)
           if obj.income <= 46605
                obj.federalTax = obj.income*15/100;
           else 
              obj.federalTax = obj.income*15/100; 
           end
        end
      
       function obj = calc_provincialTax(obj)
           if obj.income <= 42960
               obj.provincialTax = obj.income*5.05/100;
        
           else
               obj.provincialTax = obj.income*9.15/100;
           end            
       end
       
       function obj = calc_totalTax(obj)
            obj.totalTax = obj.provincialTax + obj.federalTax
            disp(totalTax)
       end
       
   end
      
end

Best Answer

Nowhere in the code did you call your federal and provincial tax calculation methods. There are at least two possible solutions:
  • Call those calculation methods in your total tax calculation method.
       function obj = calc_totalTax(obj)
            obj = calc_provincialTax(obj);
            obj = calc_federalTax(obj);
            obj.totalTax = obj.provincialTax + obj.federalTax
            disp(totalTax)
       end
  • Make the three tax-related properties Dependent properties whose values are computed when you ask for them using the value of the non-Dependent income property. See this documentation page for a short example. In the example the Balance property is not stored in the object; it's computed using the values of the DollarAmount and Current properties that are stored in the object.
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