Exercise

Splitting by multiple groups

gdp_by_industry_oceania contains the GDP generated by the agriculture and tourism industries in both 1995 and 2010. Your goal is to create a wide format data.table containing columns of GDP for each year and industry.

Instructions

100 XP

Print gdp_by_industry_oceania.
Convert gdp_by_industry_oceania to a wide format with each country as a row, splitting the "gdp" column so that the result has columns containing the gdp for each industry and each year.