asamuelson
With the 2016 US presidential race nearing completion, it is interesting to investigate the approval ratings of US presidents in the past.
This app allows the user to look at presidential approval ratings for the time period 1945-1974.
There are a few NAs in the data, which are handled by the app.
The presidents dataset in the R datasets library contains a time series based on
quarterly US presidential approval ratings from the Gallup Organisation.
According to the R documentation, more information can be found in the following reference: McNeil, D. R. (1977) Interactive Data Analysis. New York: Wiley.
A brief summary of the data can be found below.
## Min. 1st Qu. Median Mean 3rd Qu. Max. NA's
## 23.00 46.00 59.00 56.31 69.00 87.00 6
The app allows the user to enter a year and a quarter in the UI and calculates the US president's approval rating for that time period. It also plots the mean and selected approval ratings to show the user how the approval rating for the selected time period comp[ares to the historical average.
The back-end calculation in server.R is used to find and return the data for the year and quarter from the presidents time series data.