Shrub Volume Aggregation (dplyr)
This is a follow-up to Shrub Volume Data Basics.
Dr. Granger wants some summary data of the plants at her sites and for her experiments.
Check if the file shrub-volume-data.csv is already in your work space (your instructor may have already added them).
If not download the shrub dimensions data.
This code calculates the average height of a plant at each site:
shrub_dims <- read.csv('shrub-volume-data.csv')
by_site <- group_by(shrub_dims, site)
avg_height <- summarize(by_site, avg_height = mean(height))
- Modify the code to calculate and print the average height of a plant in each experiment.
- Use
max()to determine the maximum height of a plant at each site.