Table 2.

Pseudocode for executing the QPSO algorithm [18,19].

Initialise the current positions and the Pi_best positions of all the particles

Do

Calculate mbest in Equation (2)

Select a suitable value for α

For particles i = 1 to S

1. Calculate the fitness value of particle i according to classification accuracy

2. Update Pi_best and Pglobal in Equation (7)

3. For dimension 1 to d

φ = rand (0,1)

u = rand (0,1)

If s = rand (0,1) ≥ 0.5

update particle positions in Equation (4)

else

update particle positions in Equation (3)

Until terminal condition is satisfied.