Return the proportion of sparseness of a document-feature matrix, equal to the proportion of cells that have zero counts.
sparsity(x)
x | the document-feature matrix |
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dfmat <- dfm(data_corpus_inaugural) #> Warning: 'dfm.corpus()' is deprecated. Use 'tokens()' first. sparsity(dfmat) #> [1] 0.9183823 sparsity(dfm_trim(dfmat, min_termfreq = 5)) #> [1] 0.7850806