Data Analysis in R

Summarizing Numeric Variables

Code Example 2

30-45 minutes Applied Step 8 of 9

Code

Code Example 2

8 / 9

Code

Code Example 2

prepared_data |>
  group_by(site) |>
  summarise(
    n = sum(!is.na(age_years_derived)),
    missing = sum(is.na(age_years_derived)),
    median_age = median(age_years_derived, na.rm = TRUE),
    q1_age = quantile(age_years_derived, 0.25, na.rm = TRUE),
    q3_age = quantile(age_years_derived, 0.75, na.rm = TRUE),
    .groups = "drop"
  )