Updated Shiny app

March 26, 2017

(This article was first published on Bayes Ball, and kindly contributed to R-bloggers)

A short post to alert the world that my modest Shiny application, showing Major League Baseball run scoring trends since 1901, has been updated to include the 2016 season. The application can be found here:

In addition to the underlying data, the update removed some of the processing that was happening inside the application, and put it into the pre-processing stage. This processing needs to happen only the once, and is not related to the reactivity of the application. This will improve the speed of the application; in addition to reducing the processing, it also shrinks the size of the data table loaded into the application.

The third set of changes were a consequence of the updates to the Shiny and ggplot2 packages in the two years that have passed since I built the app. In Shiny, there was a deprecation for “format” in the sliderInput widget. And in ggplot2, it was a change in the quotes around the “method” specification in stat_smooth(). A little thing that took a few minutes to debug! Next up will be some formatting changes, and a different approach to one of the visualizations.


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