Four tips for creating interactive visualisations with Shiny

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I’ve recently presented a toy Shiny app at the Edinburgh Data Visualization Meetup to demonstrate how Shiny can be used to explore data interactively. In my code-assisted walkthrough, I began by discussing the data used: a set of records detailing customer purchases made on Black Friday (i.e., each customer was given a unique ID, which was repeated in long format in the case of multiple purchases). Both the customers and the items purchased are described along various dimensions (e.