Session Ready
Exercise

Simple coding for complex merges

Great news! You have access to the league's Next Gen Stats data (NGS). NGS captures player location and orientation for every player, on every play. Data is recorded 10 times per second, which means there are over 1.5 million observations per week for punts alone! The data has already been loaded to a data frame called coords.

You also have general play data on every punt that corresponds to the punts tracked by NGS. Rows in this data frame, called punts, are identified by unique combinations of GameKey and PlayId.

To join the data in a spreadsheet environment, you would create a column in each table combining GameKey and PlayId and match tables based on the new column. Here you can try a simple merge statement to join punts and coords.

Instructions
100 XP
  • View the first 10 rows of punts. Note that rows are unique to each GameKey-PlayId combination.
  • View the first 10 rows of coords.
  • Merge the two data frames with punts as the left data frame and coords as the right data frame.
  • View the first 15 rows of the new data frame, punts_w_coords.