在nltk for python中编辑Vader_lexicon.txt以添加与我的域相关的单词
我在在nltk for python中编辑Vader_lexicon.txt以添加与我的域相关的单词,python,python-3.x,nlp,nltk,sentiment-analysis,Python,Python 3.x,Nlp,Nltk,Sentiment Analysis,我在nltk中使用vader查找文件中每一行的情感。我有两个问题: 我需要在vader_lexicon.txt中添加单词,但其语法如下所示: 攻击-2.50.92195[-1,-3,-3,-4,-3,-1,-2,-2,-3] -2.5和0.92195[-1,-3,-3,-4,-3,-1,-2,-2,-3]代表什么 我应该如何为一个新词编码?假设我必须添加一些类似于'100%,'A1' 我还可以在nltk\u data\corpora\opinion\u lexicon文件夹中看到正面和负面的tx
nltk
中使用vader
查找文件中每一行的情感。我有两个问题:
vader_lexicon.txt
中添加单词,但其语法如下所示:-2.5
和0.92195[-1,-3,-3,-4,-3,-1,-2,-2,-3]
代表什么
我应该如何为一个新词编码?假设我必须添加一些类似于'100%
,'A1'
nltk\u data\corpora\opinion\u lexicon
文件夹中看到正面和负面的txt单词。如何利用这些资源?我也可以在这些txt文件中添加我的文字吗我相信维德在分类文本时只使用单词和第一个值。如果要添加新词,只需创建单词及其情感值的字典,即可使用更新功能添加:
from nltk.sentiment.vader import SentimentIntensityAnalyzer
Analyzer = SentimentIntensityAnalyser()
Analyzer.lexicon.update(your_dictionary)
您可以根据感知到的情绪强度手动分配带有情绪值的单词,或者如果这不切实际,则可以在两个类别(例如-1.5和1.5)中分配广泛的值
您可以使用此脚本(不是我的脚本)检查是否包含您的更新:
import nltk
from nltk.tokenize import word_tokenize, RegexpTokenizer
from nltk.sentiment.vader import SentimentIntensityAnalyzer
import pandas as pd
Analyzer = SentimentIntensityAnalyzer()
sentence = 'enter your text to test'
tokenized_sentence = nltk.word_tokenize(sentence)
pos_word_list=[]
neu_word_list=[]
neg_word_list=[]
for word in tokenized_sentence:
if (Analyzer.polarity_scores(word)['compound']) >= 0.1:
pos_word_list.append(word)
elif (Analyzer.polarity_scores(word)['compound']) <= -0.1:
neg_word_list.append(word)
else:
neu_word_list.append(word)
print('Positive:',pos_word_list)
print('Neutral:',neu_word_list)
print('Negative:',neg_word_list)
score = Analyzer.polarity_scores(sentence)
print('\nScores:', score)
使用基于金融的词典更新维德后:
Analyzer.lexicon.update(Financial_Lexicon)
sentence = 'stocks were volatile on Tuesday due to the recent calamities in the Chinese market'
Positive: []
Neutral: ['stocks', 'were', 'on', 'Tuesday', 'due', 'to', 'the', 'recent', 'in', 'the', 'Chinese', 'markets']
Negative: ['volatile', 'calamities']
Scores: {'neg': 0.294, 'neu': 0.706, 'pos': 0.0, 'compound': -0.6124}
谢谢@laurie。你能告诉我,如果我输入的单词没有出现在词典文件中,应该没有分数。然而,我得到了输入的正分数,因为在词汇TXT中没有单词,这很奇怪。。你能举个例子吗?您是否使用了测试脚本来检查要挑选的单词?
Analyzer.lexicon.update(Financial_Lexicon)
sentence = 'stocks were volatile on Tuesday due to the recent calamities in the Chinese market'
Positive: []
Neutral: ['stocks', 'were', 'on', 'Tuesday', 'due', 'to', 'the', 'recent', 'in', 'the', 'Chinese', 'markets']
Negative: ['volatile', 'calamities']
Scores: {'neg': 0.294, 'neu': 0.706, 'pos': 0.0, 'compound': -0.6124}