require 'daru'

require 'open-uri'
content = open('https://d37djvu3ytnwxt.cloudfront.net/asset-v1:MITx+15.071x_3+1T2016+type@asset+block/WHO.csv')
df = Daru::DataFrame.from_csv content
df = df.at 0..6
df.first

df.index = Daru::CategoricalIndex.new df['Region'].to_a

df.first 5

df.index.categories

df.row['Africa'].size

df.row['Europe']['LifeExpectancy'].mean

df.row['South-East Asia']['LifeExpectancy'].max

df.row['Europe'].sort(['LifeExpectancy'], ascending: false).first 5

df.row['South-East Asia'].sort(['FertilityRate']).row.at -10..-1