Click here to see the SAS code.
Click here to see the example.

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There were about 4,474 txt files - each containing 1 news article.

I wrote a SAS job to get a directory listing, and loop through it
and read each file into a SAS data set, with date, title, and article.
I subsetted out just the articles that mention 'Vastopolis' in them
(case-insensitive, of course), and this narrowed it down to 419 articles.

This needle/bar plot shows these 419 articles - the height of the bars
shows the number of articles per day.

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