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dtm_train_tfidf is a sparse matrix in CSC format dgCMatrix

I am using the function LiblineaR which is supposed to accept sparse matrices. However when I use the sparse matrix dtm_train_tfidf, the following error occurs: 

 library(LiblineaR)

 LiblineaR(data=dtm_train_tfidf,
 target=train$setiment, type = 4, cost = 1, epsilon = 0.1,
 +           svr_eps = NULL, bias = 1, cross = 0, verbose = FALSE,
 +           findC = FALSE)

 Error in t.default(data) : argument is not a matrix
toumperlekis
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1 Answers1

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LiblineaR relies on SparseM package which is not mainstream now-days for sparse matrices in R. You can check here on how convert dgCMatrix to "matrix.csc" from SparseM.

Dmitriy Selivanov
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