In the previous example, you didn't store the summary statistic in a data frame.
You can proceed in two steps to generate a date frame from a summary:
- Step 1: Store the data frame for further use
- Step 2: Use the dataset to create a line plot
Step 1) You compute the average number of games played by year.
ex1 <- data % > %
group_by(yearID) % > %
summarise(mean_game_year = mean(G))
- The summary statistic of batting dataset is stored in the data frame ex1.
Step 2) You show the summary statistic with a line plot and see the trend.
# Plot the graph
ggplot(ex1, aes(x = yearID, y = mean_game_year)) +
x = "Year",
y = "Average games played",
title = paste(
"Average games played from 1871 to 2016"