Ant Colony Optimization-Based Streaming Feature Selection: An Application to the Medical Image Diagnosis

Algorithm 1

Proposed algorithm.

(1)	Add initial features in search space
(2)	while new incoming features do
(3)	Generate ants
(4)	Initialize pheromone
(5)	while stopping criteria not met do
(6)	Ants create rules (subset of features)
(7)	Evaluate selected subsets (using equation (4))
(8)	Update pheromone trial of each ant (using equation (2))
(9)	Evaporate pheromone (using equation (3))
(10)	Return the best solution (using equation (1))
(11)	end while
(12)	Return best 10 subsets selected
(13)	Remove redundant features from the subsets (using equation (5))
(14)	Run 4 classifiers on selected subsets
(15)	Returns one best solution
(16)	End while