c) State of Union Addresses (1790-2012) (zip file)
Interpreting results from topic modeling takes practice. It's also helpful to produce graphs that may help visualize the results. Here's an example of some visualization of results from a topic modeling approach to State of Union Addresses: 2005-2012. Topics and their contributions. The full spreadsheet is here.
The network graph shows which topics are shared, and which are unique.
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