# File lib/ai4r/classifiers/zero_r.rb, line 30 def build(data_set) data_set.check_not_empty @data_set = data_set frequence = {} max_freq = 0 @class_value = nil @data_set.data_items.each do |example| class_value = example.last class_frequency = frequence[class_value] class_frequency = (class_frequency) ? class_frequency+1 : 1 if max_freq < class_frequency max_freq = class_frequency @class_value = class_value end end return self end