The data in air.csv relate to airline cancellations and delays for the year 2008. You can download the air.csv dataset from http://rtricks4kids.ok.ubc.ca/wjbraun/DS550/air.csv. It is too large to fit on the regular github repository. In order to read the data from air.csv into R, you will need to type:
air <- read.csv("air.csv")
summary(air)
head(air)
To run this shiny app, you will need to use ord.RData and airdf.RData data sets.
shrinking_air_dataset.R creates these two data sets ord.RData and airdf.RData from the original air.csv file.