I have written following code based on knowledge which i understood. I have done mistakes in PSOoptimize() method but not getting what exactly it is ? fitness_function is not working for swarm[i].position then with what I can optimize number of features?
In my opinion, your program does not implement feature selection. The particle obtained by PSO should tell you what features you should use in the construction of your classifier.
For example, Bing Xue in Article Particle swarm optimisation for feature selection in classif...
indicate that:"In PSO for feature selection, the representation of a particle is a n-bit string, where n is the total number of features in the dataset. The position value is in [0,1], which shows the probability of the feature being selected. A threshold θ is used to determine whether a feature is selected or not. "
Best regards