result <- slda.em(documents=corpus$documents,
K=num.topics,
vocab=corpus$vocab,
num.e.iterations=30,
num.m.iterations=12,
alpha=1.0, eta=0.1,
poliblog.ratings / 100,
params,
variance=0.25,
lambda=1.0,
logistic=FALSE,
method="sLDA")
这个是代码,出现:Error in slda.em(documents = corpus$documents, K = num.topics, vocab = corpus$vocab, :
All documents must have positive length.
求大神教下如何解决


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