# File lib/ai4r/classifiers/prism.rb, line 34 def build(data_set) data_set.check_not_empty @data_set = data_set domains = @data_set.build_domains instances = @data_set.data_items.collect {|data| data } @rules = [] domains.last.each do |class_value| while(has_class_value(instances, class_value)) rule = build_rule(class_value, instances) @rules << rule instances = instances.select {|data| !matches_conditions(data, rule[:conditions])} end end return self end