Computing in j (I)
Since columns can be treated as variables inside data.table's square brackets ([ ]), you can compute on the columns directly in j.
Cet exercice fait partie du cours
Data Manipulation with data.table in R
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
# Calculate median duration using the j argument
median_duration <- ___
median_duration