March 2018
Intermediate to advanced
528 pages
13h 2m
Portuguese (Portugal, Brazil)
Content preview from R para Data Science
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106 | Capítulo 5: Análise Exploratória de Dados
Padrões fornecem uma das ferramentas mais úteis para cientistas de dados, porque
revelam a covariação. Se você pensa na variação como um fenômeno que cria incerteza,
a covariação é um fenômeno que a reduz. Se duas variáveis covariam, você pode usar
os valores de uma variável para fazer previsões melhores sobre os valores da segunda.
Se a covariação acontece devido a um relacionamento causal (um caso especial), então
você pode usar o valor de uma variável para controlar o valor da segunda.
Modelos são uma ferramenta para extrair padrões dos dados. Por exemplo, considere
os dados sobre os diama
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