The Conflicted Package
Great package authors think alike. This means they often come up with the same function name.
In base R, there is a function called lag() that is used in time-series. In the dplyr package,
a similarly named function used to next values in a vector.
You are going to use the conflicted package to handle this issue.
Deze oefening maakt deel uit van de cursus
Defensive R Programming
Oefeninstructies
- Load the dplyr and conflicted packages.
- Use
conflict_prefer()to select the dplyr version oflag(). - Test the
lag()function and verify it gives the expected output. This has been done for you.
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
# Load the dplyr and conflicted packages
library("___")
library("___")
# Prefer the dplyr version of the lag function
conflict_prefer("___", "___")
# This should return NA, 1, 2, 3
lag(1:4)