Plot a Topic Hierarchy Dendrogram

Draws the merge tree as a dendrogram labeled with topic labels, with cosine distance on the height axis. Early merges at small heights are near-duplicate topics.

Usage

# S3 method for class 'sbert_topic_hierarchy'
plot(x, main = "Topic hierarchy", cex = 0.8, ...)

Arguments

x

An `sbert_topic_hierarchy` object.

main

Plot title.

cex

Character expansion factor for labels.

...

Passed to [plot.dendrogram()].

Value

The hierarchy object, invisibly.

Examples

text <- c(
  "Cats chase mice", "Dogs chase balls", "Kittens nap in sunshine",
  "Stocks and bonds trade", "Markets price shares", "Banks report profit"
)
embeddings <- rbind(
  c(1, 0), c(0.95, 0.05), c(0.9, 0.1),
  c(0, 1), c(0.05, 0.95), c(0.1, 0.9)
)
tree <- topic_hierarchy(topics(text, 3, embeddings = embeddings, n_terms = 3))
plot(tree)