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Table 2 Characteristics of the temporal network of associated topics

From: Evaluating latent content within unstructured text: an analytical methodology based on a temporal network of associated topics

Year Instances
(Number of documents)
Vocabulary
(Distinct tokens)
Nodes
(Number of topics)
Edges
(Topic cooccurrence)
1999 195 15,824 65 468
2000 220 16,927 64 456
2001 211 17,017 60 402
2002 230 17,922 63 420
2003 269 19,323 63 444
2004 303 19,848 58 360
2005 314 20,876 63 393
2006 299 20,704 59 363
2007 401 22,691 65 435
2008 405 22,939 62 435
2009 495 23,975 62 399
2010 509 24,531 65 390
2011 671 25,877 64 408
2012 683 25,897 60 360
2013 793 26,853 61 360
2014 943 27,612 61 339
2015 1019 27,864 62 363
2016 1188 28,262 59 306
2017 1094 28,276 65 372
2018 1229 28,527 63 327
  1. Table 2 lists the characteristics of the temporal network of associated topics, over the 20-year time series. The number of topics (or nodes) listed in Table 2 are those with at least one edge (or cooccurrence) with another topic. Hence, isolated topics not addressed with any of the 70 identified topics are not included in the number of nodes listed in Table 2