Web1. Construction of decision tree 1.1 Advantages and disadvantages advantage: The calculation complexity is not high: taking ID3 as an example, each operation is based on … Webimport operator def majorityCnt(classList): classCount={} for vote in classList: if vote not in classCount: classCount[vote]=1 else: classCount[vote]+=1 ...

Note statistical learning method: Decision Tree

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决策树机器学习分类基础代码（最基础方法）

In this case, the majority voting method is adopted to classify the leaf node 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 … WebYou're stronger together. Schools prefer Classlist to social media because it encourages inclusivity and community. Whilst parents use Classlist to make friends, plan parties, … Webdef majorityCnt(classList): """majorityCnt(选择出现次数最多的一个结果) Args: classList label列的集合: Returns: bestFeature 最优的特征列 """ # -----majorityCnt的第一种方式 … good credit bad credit car dealers denver