Change the Selection variable
The last step in converting our data to long format is changing the Selection
column where the choice is stored. In the wide format data, the choice is stored as an integer indicating which alternative was chosen. In long format it should be a logical or 0-1 variable indicating which alternative was chosen.
This exercise is part of the course
Choice Modeling for Marketing in R
Exercise instructions
- Use
head()
to look at theSelection
variable where the choice is contained. Notice thatSelection
contains an integer for the number of the chosen alternative. - Assign
chocolate$Alt == chocolate$Selection
tochocolate$Selection
. - Use
head()
to see how theSelection
variable has been transformed.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Use head(chocolate) and look at the Selection variable.
# Transform the Selection variable to a logical indicator
chocolate$Selection <-
# Use head(chocolate) to see how the Selection variable has changed. Now it is logical.