Concatenating a list of data.tables
A list of data.table
s has been loaded into your R session: gdp
. Its elements contain a data.table
for each continent, each data.table
containing the gross domestic product (gdp) in the year 2000 for the countries in each continent (data sourced from the Gapminder foundation). Your goal is to build a new data.table
containing the observations from all data.table
s in the gdp
list
This exercise is part of the course
Joining Data with data.table in R
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Concatenate its data.tables
gdp_all_1 <- ___