April 2025
Intermediate to advanced
504 pages
15h
Portuguese (Portugal, Brazil)
Content preview from Análise prática de séries temporais
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Capítulo 2. Encontrar e manipular dados de séries temporais
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Neste capítulo, abordamos os problemas que podem surgir durante o pré-processamento de dados de séries cronológicas. Alguns destes problemas serão familiares aos analistas de dados experientes, mas existem dificuldades específicas colocadas pelos carimbos temporais. Como em qualquer tarefa de análise de dados, a limpeza e o processamento correto dos dados é frequentemente o passo mais importante de um pipeline de carimbos temporais. As técnicas sofisticadas não podem corrigir dados confusos.
A maioria dos analistas de dados terá de encontrar, alinhar, depurar e suavizar os seus próprios dados, quer para aprender a análise de séries cronológicas, quer para fazer um trabalho significativo nas suas organizações. À medida que preparas os dados, terás de realizar uma variedade de tarefas, desde juntar colunas díspares a reamostragem de dados irregulares ou em falta, até ao alinhamento de séries cronológicas com diferentes eixos temporais. Este capítulo ajuda-te no caminho para um conjunto de dados de séries cronológicas interessante e devidamente preparado.
Discutimos as seguintes competências úteis para encontrar e limpar dados de séries cronológicas:
Encontrar dados de séries cronológicas em repositórios online
Descobrir e preparar dados de séries cronológicas a partir de fontes não originalmente destinadas ...
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