Let’s say we’ve managed to find an interesting dataset 1 on heights for given countries since 1550 (yup!):
country
year
height_cm
continent
Afghanistan
1870
168.40
Asia
Afghanistan
1880
165.69
Asia
Afghanistan
1930
166.80
Asia
Afghanistan
1990
167.10
Asia
Afghanistan
2000
161.40
Asia
Albania
1880
170.10
Europe
We’ve got country, year, height (in centimetres), and continent. Neat!
Now, let’s look ...
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