build_graph {topicmodels}R Documentation

Construct the adjacency matrix for a topic graph

Description

The lasso is used to determine which edges are present in a topic graph.

Usage

build_graph(x, lambda, and = TRUE)

Arguments

x Object of class "CTM".
lambda Numeric in [0,1] indicates the relative bound on the L1-norm of the parameters.
and Logical; if TRUE the graph is computed by taking the intersection of the neighbors, otherwise the union is determined.

Value

Returns an adjacency matrix for the topics versus topics graph.

Author(s)

David M. Blei, modified by Bettina Gruen

References

Blei D.M., Lafferty J.D. (2007). A Correlated Topic Model of Science. The Annals of Applied Statistics, 1(1), 17-35.


[Package topicmodels version 0.0-3 Index]