January 2010
Beginner
480 pages
15h 36m
Portuguese (Portugal, Brazil)
Content preview from USE A CABEÇA! ANÁLISE DE DADOS
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410 Capítulo 13
a classifi cação mostra as duplicidades
t
A classifi cação dos seus dados no R pela
IDdaPessoa
revelou as
duplicidades?
Sim, há muitos nomes
duplicados. Muitos
mesmo. Que bagunça!
Quando você recebe dados bagunçados, você
deve classi cá-los de maneira progressiva.
Normalmente é muito difícil ver todos os dados
de uma vez, e a classi cação dos dados de acordo
com os campos permite que você visualize grupos
de modo a ajudá-lo a encontrar as duplicidades
ou qualquer outra coisa estranha.
13- Use a Cabe‡a Data Analysis - Cap¡tulo 13.indd 410 22/07/2010 17:00:20
limpando os dados
você está aqui
411
Há alguma coisa
estranha aqui! Por que ...
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