Survey Data Variation 2 with Cap Keys
A data.table with 15 rows and 6 variables:
- country
Factor with levels: "A", "B".
- year
Numeric, with values: 2010, 2011, 2012, 2013.
- variable1
Numeric.
- variable2
Numeric. Modified variable values.
- variable3
Numeric.
- variable4
Numeric.