Silvia Canelón

Our illustrated penguins have reached the stringr package! The photo backdrop is a snowy Antarctic wonderland featuring a Gentoo penguin with outstretched flippers

Photo by James Eades on Unsplash

stringr: info

`stringr` helps us manipulate strings!

The package includes many functions to help us with regular expressions, which are a concise language for describing patterns in strings.

These functions help us

detect matches
subset strings
manage string lengths
mutate strings
join and split strings
order strings
…and more!

What does this chunk do?

penguins |>
  select(species, island) |>
  mutate(ISLAND = str_to_upper(island))

# A tibble: 344 × 3
   species island    ISLAND   
   <fct>   <fct>     <chr>    
 1 Adelie  Torgersen TORGERSEN
 2 Adelie  Torgersen TORGERSEN
 3 Adelie  Torgersen TORGERSEN
 4 Adelie  Torgersen TORGERSEN
 5 Adelie  Torgersen TORGERSEN
 6 Adelie  Torgersen TORGERSEN
 7 Adelie  Torgersen TORGERSEN
 8 Adelie  Torgersen TORGERSEN
 9 Adelie  Torgersen TORGERSEN
10 Adelie  Torgersen TORGERSEN
# ℹ 334 more rows

How about this one?

penguins |>
  select(species, island) |>
  mutate(ISLAND = str_to_upper(island)) |>
  mutate(species_island = str_c(species, ISLAND, sep = "_"))

# A tibble: 344 × 4
   species island    ISLAND    species_island  
   <fct>   <fct>     <chr>     <chr>           
 1 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
 2 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
 3 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
 4 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
 5 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
 6 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
 7 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
 8 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
 9 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
10 Adelie  Torgersen TORGERSEN Adelie_TORGERSEN
# ℹ 334 more rows