March 2018
Intermediate to advanced
528 pages
13h 2m
Portuguese (Portugal, Brazil)
Content preview from R para Data Science
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402 | Capítulo 20: Muitos Modelos compurrr e broom
#> 4 1967 34.0 11537966 836
#> 5 1972 36.1 13079460 740
#> 6 1977 38.4 14880372 786
#> # ... with 6 more rows
Note a diferença: em um data frame agrupado, cada linha é uma observação; em um data
frame aninhado, cada linha é um grupo. Outra maneira de pensar sobre um conjunto
de dados aninhado é que agora temos uma metaobservação: uma linha que representa
o curso de tempo completo para um país, em vez de um único ponto no tempo.
List-Columns
Agora que temos nosso data frame aninhado, estamos em uma boa posição para ajustar
alguns modelos. Temos uma função para ajustar modelos:
country_model <- function ...
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