True Shooting Percentage Calculator

A Data Project from Coursera

Mark H.
October, 2016

Introduction

This presentation is part of the Course Project for the Coursera Developing Data Products class. The peer assessed assignment has two parts. First, we need to create a Shiny application and deploy it on Rstudio's servers.

Second, we should use Slidify or Rstudio Presenter to prepare a reproducible pitch presentation about the application. This presentation adresses the second part of the course project.

The app developed for the first part of the assignment is avalilable at: https://markh.shinyapps.io/TrueShot/

Source code for ui.R and server.R files are available on the GitHub: https://github.com/sweimh/Shiny-Application-True-Shot-Prct

True Shooting Percentage (TS%)

In basketball, shooting percentage is a general measure of the likeliness of a player's shooting attempt converts (scores).

However, all shots are not weighted equally - one point for free throws (FT), two points for a field goals made within certain distance from a basket, or three points for attempts made from further away. As a result, the proliferation of a player's shot tends to be measured separately, by FT%, FG%, and three-point FG%.

True shooting percentage (TS%) intends to be the one measure that "more accurately calculate a player's shooting than field goal percentage, free throw percentage, and three-point field goal percentage taken individually. Two- and three-point field goals and free throws are all considered in its calculation."

Over 170 NBA players took more than 500 shots during the 2015-16 NBA regular season*. Based on their calculated TS%, ranging from 0.437 to 0.669.

*Data source: http://www.sportingcharts.com/nba/stats/player-true-shooting-percent-leaders/2015/

TS% Formula and Embedded Code

TS% Formula \[TS\% = \frac{PTS}{2{(FGA + {0.44 \times FTA}})}\]

PTS = points scored
FGA = field goal attempts
FTA = free throw attempts

Embedded Code

TSPct_calc <- function(pts, fga, fta) {pts/(2*(fga+(0.44*fta)))}

Links to App and Source

The app developed for the first part of the assignment is avalilable at:

https://markh.shinyapps.io/TrueShot/

Source code for ui.R and server.R files are available on the GitHub:

https://github.com/sweimh/Shiny-Application-True-Shot-Prct