March 2018
Intermediate to advanced
528 pages
13h 2m
Portuguese (Portugal, Brazil)
Content preview from R para Data Science
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Separando e Unindo | 157
Separando e Unindo
Até agora você aprendeu a arrumar table2 e table4, mas não a table3. A table3
tem um problema diferente: uma coluna (rate) que contém duas variáveis (cases e
population). Para corrigir esse problema, precisaremos da função separate(). Você
também aprenderá sobre o complemento de separate(): unite(), que você usa se uma
única variável estiver espalhada por várias colunas.
Separar
separate() separa uma coluna em várias outras ao dividir sempre que um caractere
separador aparece. Veja a table3:
table3
#> # A tibble: 6 ×
3
#> country year rate
#> * <chr> <int> <chr>
#> 1 Afghanistan 1999 745/19987071
#> 2 Afghanistan ...
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