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CountVectorizer()需要设定token_pattern参数 #16

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yetionyo opened this issue May 9, 2018 · 0 comments

yetionyo commented May 9, 2018

默认的token_pattern为'(?u)\b\w\w+\b'，这样的话似乎会忽略长度为1的字符，如'1'、'2'，从而导致特征缺失。若nan填充为'-1'的话，可考虑设置token_pattern为'(?u)\b(?<!-)\d+\b'

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