build_graph

From topicmodels v0.2-4 by Bettina Gruen

Construct the adjacency matrix for a topic graph

The lasso is used to determine which edges are present in a topic graph. The original R code was written by David M. Blei and co-authors and is available together with the C code for fitting the CTM.

Keywords: dplot

Usage

build_graph(x, lambda, and = TRUE)

Arguments

x: Object of class "CTM".
lambda: Numeric in $[0,1]$ indicating 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.

References

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

Documentation reproduced from package topicmodels, version 0.2-4, License: GPL-2

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