资源简介
朴素贝叶斯python版本,内容很详细,直接可用,可以从代码更容易理解朴素贝叶斯背后的原理。
代码片段和文件信息
# -*- coding: utf-8 -*-
“““
Created on Mon Aug 27 16:46:26 2018
@author: caomao
“““
from numpy import *
import numpy as np
from math import *
def loadDataSet():
postingList=[[‘my‘ ‘dog‘ ‘has‘ ‘flea‘ ‘problems‘ ‘help‘ ‘please‘]
[‘maybe‘ ‘not‘ ‘take‘ ‘him‘ ‘to‘ ‘dog‘ ‘park‘ ‘stupid‘]
[‘my‘ ‘dalmation‘ ‘is‘ ‘so‘ ‘cute‘ ‘I‘ ‘love‘ ‘him‘]
[‘stop‘ ‘posting‘ ‘stupid‘ ‘worthless‘ ‘garbage‘]
[‘mr‘ ‘licks‘ ‘ate‘ ‘my‘ ‘steak‘ ‘how‘ ‘to‘ ‘stop‘ ‘him‘]
[‘quit‘ ‘buying‘ ‘worthless‘ ‘dog‘ ‘food‘ ‘stupid‘]]
classVec = [010101] #1 is abusive 0 not
return postingListclassVec
# remove repeat words
def createVocabList(dataSet):
vocabSet = set([])
for document in dataSet:
vocabSet = vocabSet | set(document)
return list(vocabSet)
def setOfWord2Vec(vocabListinputSet):
returnVec = [0]*len(vocabList)
for word in inputSet:
if word in vocabList:
returnVec[vocabList.index(word)]=1
else:
print “the word: %s is not in my vocab“ % word
return returnVec
def bagOfWords2VecMN(vocabListinputSet):
returnVec = [0]*len(vocabList)
for word in inputSet:
if word in vocabList:
returnVec[vocabList.index(word)] += 1
return re
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