question: private Individuum makeIndividuum ( short [ ] gene ) { final DBIDs ids = computeSubspaceForGene ( gene , ranges ) ; final double fitness = ( ids . size ( ) > 0 ) ? sparsity ( ids . size ( ) , dbsize , k , phi ) : Double . MAX_VALUE ; return new Individuum ( fitness , gene ) ; }
target:  Make a new individuum helper, computing sparsity=fitness