textplot_network.Rd
Plot an fcm object as a network, where edges show cooccurrences of features.
textplot_network(x, min_freq = 0.5, omit_isolated = TRUE, edge_color = "#1F78B4", edge_alpha = 0.5, edge_size = 2, vertex_color = "#4D4D4D", vertex_size = 2, vertex_labelcolor = NULL, vertex_labelfont = NULL, vertex_labelsize = 5, offset = NULL, ...) # S3 method for fcm as.network(x, min_freq = 0.5, omit_isolated = TRUE, ...) # S3 method for fcm as.igraph(x, min_freq = 0.5, omit_isolated = TRUE, ...)
x  

min_freq  a frequency count threshold or proportion for cooccurrence frequencies of features to be included. 
omit_isolated  if 
edge_color  color of edges that connect vertices. 
edge_alpha  opacity of edges ranging from 0 to 1.0. 
edge_size  size of edges for most frequent cooccurrence The size of other edges are determined proportionally to the 99th percentile frequency instead of the maximum to reduce the impact of outliers. 
vertex_color  color of vertices. 
vertex_size  size of vertices 
vertex_labelcolor  color of texts. Defaults to the same as

vertex_labelfont  fontfamily of texts. Use default font if

vertex_labelsize  size of vertex labels in mm. Defaults to size 5. Supports both integer values and vector values. 
offset  if 
...  additional arguments passed to network or
graph_from_adjacency_matrix. Not used for 
Currently the size of the network is limited to 1000, because of the
computationally intensive nature of network formation for larger matrices.
When the fcm is large, users should select features using
fcm_select, set the threshold using min_freq
, or implement
own plotting function using as.network
.
set.seed(100) toks < corpus_subset(data_corpus_irishbudget2010) %>% tokens(remove_punct = TRUE) %>% tokens_tolower() %>% tokens_remove(pattern = stopwords("english"), padding = FALSE) fcmat < fcm(toks, context = "window", tri = FALSE) feat < names(topfeatures(fcmat, 30)) fcm_select(fcmat, pattern = feat) %>% textplot_network(min_freq = 0.5)fcm_select(fcmat, pattern = feat) %>% textplot_network(min_freq = 0.8, vertex_labelcolor = rep(c('gray40', NA), 15))fcm_30 < fcm_select(fcmat, pattern = feat) textplot_network(fcm_30, vertex_labelsize = rowSums(fcm_30)/min(rowSums(fcm_30)))# Vector inputs to vertex_labelsize can be scaled if too small / large textplot_network(fcm_30, vertex_labelsize = 1.5 * rowSums(fcm_30)/min(rowSums(fcm_30)))# as.igraph if (requireNamespace("igraph", quietly = TRUE)) { txt < c("a a a b b c", "a a c e", "a c e f g") mat < fcm(txt) as.igraph(mat, min_freq = 1, omit_isolated = FALSE) }#> IGRAPH c7f53c5 DN 6 26  #> + attr: name (v/c), frequency (v/n) #> + edges from c7f53c5 (vertex names): #> [1] a>b a>b a>b a>b a>b a>b a>c a>c a>c a>c a>c a>c b>c b>c a>e #> [16] a>e a>e c>e c>e a>f c>f e>f a>g c>g e>g f>g