Sorts a dfm by descending frequency of total features, total features in documents, or both.
dfm_sort(x, decreasing = TRUE, margin = c("features", "documents", "both"))Document-feature matrix created by dfm()
logical; if TRUE, the sort will be in descending
order, otherwise sort in increasing order
which margin to sort on features to sort by frequency of
features, documents to sort by total feature counts in documents,
and both to sort by both
A sorted dfm matrix object
dfmat <- dfm(tokens(data_corpus_inaugural))
head(dfmat)
#> Document-feature matrix of: 6 documents, 9,437 features (93.83% sparse) and 4 docvars.
#> features
#> docs fellow-citizens of the senate and house representatives :
#> 1789-Washington 1 71 116 1 48 2 2 1
#> 1793-Washington 0 11 13 0 2 0 0 1
#> 1797-Adams 3 140 163 1 130 0 2 0
#> 1801-Jefferson 2 104 130 0 81 0 0 1
#> 1805-Jefferson 0 101 143 0 93 0 0 0
#> 1809-Madison 1 69 104 0 43 0 0 0
#> features
#> docs among vicissitudes
#> 1789-Washington 1 1
#> 1793-Washington 0 0
#> 1797-Adams 4 0
#> 1801-Jefferson 1 0
#> 1805-Jefferson 7 0
#> 1809-Madison 0 0
#> [ reached max_nfeat ... 9,427 more features ]
head(dfm_sort(dfmat))
#> Document-feature matrix of: 6 documents, 9,437 features (93.83% sparse) and 4 docvars.
#> features
#> docs the , of and . to in a our we
#> 1789-Washington 116 70 71 48 23 48 31 14 1 1
#> 1793-Washington 13 5 11 2 4 5 3 0 0 0
#> 1797-Adams 163 201 140 130 33 72 47 51 6 3
#> 1801-Jefferson 130 128 104 81 37 61 24 21 24 10
#> 1805-Jefferson 143 142 101 93 41 83 35 20 24 13
#> 1809-Madison 104 47 69 43 21 61 34 19 9 2
#> [ reached max_nfeat ... 9,427 more features ]
head(dfm_sort(dfmat, decreasing = FALSE, "both"))
#> Document-feature matrix of: 6 documents, 9,437 features (96.33% sparse) and 4 docvars.
#> features
#> docs notification 14th fondest predilection flattering asylum
#> 1793-Washington 0 0 0 0 0 0
#> 1945-Roosevelt 0 0 0 0 0 0
#> 1865-Lincoln 0 0 0 0 0 0
#> 1905-Roosevelt 0 0 0 0 0 0
#> 1849-Taylor 0 0 0 0 0 0
#> 1829-Jackson 0 0 0 0 0 0
#> features
#> docs interruptions awaken distrustful despondence
#> 1793-Washington 0 0 0 0
#> 1945-Roosevelt 0 0 0 0
#> 1865-Lincoln 0 0 0 0
#> 1905-Roosevelt 0 0 0 0
#> 1849-Taylor 0 0 0 0
#> 1829-Jackson 0 0 0 0
#> [ reached max_nfeat ... 9,427 more features ]