snownlp
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minus value in simuarity
st = SnowNLP([[u'吃饭',u'睡觉',u'打豆豆'], [u'吃饭',u'烤肉',u'懒觉',u'打游戏'], ['吃吃喝喝']]) st.sim([u'吃饭',u'睡觉',u'打豆豆'])
and result is [0.4836218923228314, -0.4170005091967271, 0] so what is the meaning of minus simularity