Anonymous data was collected from urine samples at huts along the climb of Mont Blanc. Several types of drugs were tested, and proportions were reported.
A data frame with 211 rows and 6 variables.
Idendification number of a specific urine sample.
Location where the sample was taken.
Substance detected to be present in the urine sample.
Amount of substance found measured in ng/ml.
Indicates that the concentration was determined by screening analysis.
Indicates that this substance was always detected concomitantly with the previous one, within the same urine sample.
library(dplyr) # Calculate the average concentration of each substance and number of occurrences. climber_drugs %>% group_by(substance) %>% summarize(count = n(), mean_con = mean(concentration)) # Proportion samples in which each substance was detected. climber_drugs %>% group_by(substance) %>% summarize(prop = n() / 154)