Question

Filter in R Language

Answer 1

Before you intend to do an operation, you can filter the dataset. The dataset starts in 1871, and the analysis does not need the years prior to 1980.

# Filter
data % > %
	filter(yearID > 1980) % > %
	group_by(yearID) % > %
	summarise(mean_game_year = mean(G))

Code Explanation

• filter(yearID > 1980): Filter the data to show only the relevant years (i.e. after 1980)
• group_by(yearID): Group by year
• summarise(mean_game_year = mean(G)): Summarize the data