Remove empty documents from DocumentTermMatrix in R topicmodels?

Question

I am doing topic modelling using the topicmodels package in R. I am creating a Corpus object, doing some basic preprocessing, and then creating a DocumentTermMatrix:

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Answer 1

"Each row of the input matrix needs to contain at least one non-zero entry"

The error means that sparse matrix contain a row without entries(words). one Idea is to compute the sum of words by row

rowTotals <- apply(dtm , 1, sum) #Find the sum of words in each Document
dtm.new   <- dtm[rowTotals> 0, ]           #remove all docs without words