March 2018
Intermediate to advanced
528 pages
13h 2m
Portuguese (Portugal, Brazil)
Content preview from R para Data Science
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Trechos de Código | 433
O dependson deve conter um vetor de caracteres de cada chunk, dos quais o chunk
em cache depende. O knitr atualizará os resultados para o chunk em cache sempre que
detectar que uma de suas dependências mudou.
Note que os chunks não atualizarão se um_arquivo_muito_grande.csv mudar, porque
o cache do kn itr só rastreia mudanças dentro do arquivo .Rmd. Se você também quiser
rastrear mudanças para esse arquivo, pode usar a opção cache.extra. Essa é uma ex-
pressão arbitrária de R que invalidará o cache sempre que ele mudar. Uma boa função
para usar é file.info(), que retorna várias informações sobre o arquivo, incluindo
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