Gensim LDA给出主题ID的输出，但概率不等于1

Question

我训练了LDA模型来聚类100个主题，据我所知，每个主题都应该有一定的概率输出，所有的结果加起来都是1。

但是当我运行这段代码时，我只得到两个主题。

请帮帮忙。

text = "A blood cell, also called a hematocyte, is a cell produced by hematopoiesis and normally found in blood."

# transform text into the bag-of-words space
bow_vector = dictionary.doc2bow(tokenize(text))
lda_vector = lda_model[bow_vector]
print("LDA Output: ", lda_vector)
print("\nTop Keywords from highest prob Topic: ",lda_model.print_topic(max(lda_vector, key=lambda item: item[1])[0]))
print("\n\nAddition of all the probabilities from LDA output:",functools.reduce(lambda x,y:x+y,[i[1] for i in lda_vector]))

LDA输出：(64，0.6952628)，(69，0.18223721) 0.042*“健康”+0.032*“医疗”+0.017*“病人”+0.016*“癌症”+0.015*“医院”+0.015*说“+0.015*”治疗+0.012*“医生”+0.012*“护理”+0.012*“药物” 从LDA输出中添加所有概率: 0.8775

Answer 1

如果将参数minimum_probability of LdaModel设置为0，则之和将为1 (或由于逼近误差而接近1 )。它控制过滤文档返回的主题。