For a class object with a property that is an array of class objects, how to find the element in that array with highest property value

I have a class object, where one of the properties of the object is an array of objects of a different class. So ClassA has a property called 'population' which is an array of ClassB objects. ClassB has a property called 'fitness'. I want to find the element in the 'population' that has the highest fitness.

classdef ClassA < handle
     properties
        population ClassB
     end
      methods
        function obj = ClassA(target, popSize)
             n = 1;
                while n <= popSize                    
                    obj.population(n) = ClassB(target);
                    n = n + 1;
                end
        end
      end

       classdef ClassB < handle
          properties
              genes
              fitness 
          end
      end

The ClassA constructor works. I'm able to fill the array with ClassB objects, each of them having a unique value for ClassB.fitness. I've tried the max() function, as seen below:

      target = 'Hello!';
      popSize = 100;
      obj = Population(target,popSize);
      [M, I] = max(obj.population.fitness)

But, to no avail. Any suggestions on how to find the max fitness without using a loop?

Thank you!

Answer 1

[Richard Brown]

Your

obj.population.fitness

line returns comma separated values, not an array. So just enclose it in brackets:

[M, I] = max([obj.population.fitness])

[Antonio Rubio]

Yes! this worked very nicely.

Thank You