WebNov 13, 2024 · 利用majorityCnt方法获取一个集合中，出现次数最多的标签 # 获取出现次数最多的类别 def majorityCnt(classList): classCount = collections.defaultdict(int) # 遍历所有的类别 for vote in classList: classCount[vote] += 1 # 降序排序，第一行第一列就是最多的 sortedClassCount = sorted(classCount.items(), key=operator.itemgetter(1), … Webimport dtree import operator def majorityCnt(classList): classCount = {} for vote in classList: if vote not in classCount.keys(): classCount[vote] = 0 classCount[vote] +=1 sortedClassCount = sorted(classCount.iteritems(),key = operator.itemgetter(1),reverse = True) return sortedClassCount[0] [0] def createTree(dataSet,labels): classList = …

[机器学习实战] 使用ID3算法的决策树 - 编程猎人

WebApr 2, 2024 · MajorityCnt (classList) Since we recursively build the decision tree based on the consumption of attributes, there may be a last attribute used up, but the classification is not finished, at which point the node classification will be calculated by majority vote … WebSep 3, 2024 · def majorityCnt(classList): classCount= {} for vote in classList: if vote not in classCount.keys (): classCount [vote] = 0 classCount [vote] += 1 sortedClassCount = sorted (classCount.iteritems (), key=operator.itemgetter ( 1 ), reverse= True ) return sortedClassCount [ 0 ] [ 0 ] def createTree(dataSet,labels): classList = [example [- 1] for … hellraiser ii

Python3 《机器学习实战》决策树算法

Webdef createTree(dataSet, labels): classList = [example[-1] for example in dataSet] ... == 1: # 结束划分 如果没有更多的特征了 都为同一类属性标签了 return majorityCnt(classList) … Webdef majorityCnt(classList): #功能——多数表决程序； classCount={} for vote in classList: #需要进行表决的类的集合. if vote not in classCount.keys(): #这里主要用字典的方式来 … WebMajority definition, the greater part or number; the number larger than half the total (opposed to minority): the majority of the population. See more. hellraiser jeans