Question

Find the lifeExp in Europe across the years. Which year is the highest lifeExp in Europe?, in R command codes

Answer 1

library(gapminder)
library(dplyr)

gapminder %>% filter(continent=="Europe")

A tibble: 360 x 6
   country continent  year lifeExp     pop gdpPercap
   <fct>   <fct>     <int>   <dbl>   <int>     <dbl>
 1 Albania Europe     1952    55.2 1282697     1601.
 2 Albania Europe     1957    59.3 1476505     1942.
 3 Albania Europe     1962    64.8 1728137     2313.
 4 Albania Europe     1967    66.2 1984060     2760.
 5 Albania Europe     1972    67.7 2263554     3313.
 6 Albania Europe     1977    68.9 2509048     3533.
 7 Albania Europe     1982    70.4 2780097     3631.
 8 Albania Europe     1987    72   3075321     3739.
 9 Albania Europe     1992    71.6 3326498     2497.
10 Albania Europe     1997    73.0 3428038     3193.

gapminder %>% filter(continent=="Europe") %>% arrange(desc(lifeExp))

A tibble: 360 x 6
   country     continent  year lifeExp      pop gdpPercap
   <fct>       <fct>     <int>   <dbl>    <int>     <dbl>
 1 Iceland     Europe     2007    81.8   301931    36181.
 2 Switzerland Europe     2007    81.7  7554661    37506.
 3 Spain       Europe     2007    80.9 40448191    28821.
 4 Sweden      Europe     2007    80.9  9031088    33860.
 5 France      Europe     2007    80.7 61083916    30470.
 6 Switzerland Europe     2002    80.6  7361757    34481.
 7 Italy       Europe     2007    80.5 58147733    28570.
 8 Iceland     Europe     2002    80.5   288030    31163.
 9 Italy       Europe     2002    80.2 57926999    27968.
10 Norway      Europe     2007    80.2  4627926    49357.

hence 2007 is highest lifeExp in Europe