Compute the sparsity of a document-feature matrix

Return the proportion of sparseness of a document-feature matrix, equal to the proportion of cells that have zero counts.

sparsity(x)

Arguments

x

the document-feature matrix

Examples

dfmat <- dfm(tokens(data_corpus_inaugural))
sparsity(dfmat)
#> [1] 0.9183668
sparsity(dfm_trim(dfmat, min_termfreq = 5))
#> [1] 0.7851998