Have you ever tried to run a cluster analysis on text topics? I am trying to come up with a way to identify changes in topics over time and think this may be an approach to consider. But, I am having a hard time figuring out where to start. I have weekly (could be daily or monthly) collection of documents that I run through SAS Text Miner including the Text Topic node. The end result is a number of multi-term topics identified by SAS Text Miner running unsupervised. I would like to compare one week to another to see what is changing. The Text Topic results show me the topics with the first 5 terms, but I know that there are additional terms in each topic. Could you use these terms (the first 5 or all of them) in a cluster analysis to see how similar they are to the topics generated in the following week? Is there a more obvious approach that I am missing? Thanks.
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