March 2025
Intermediate to advanced
416 pages
10h 2m
Portuguese (Portugal, Brazil)
Content preview from Visualização de dados com o Microsoft Power BI
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Capítulo 2. Bússola de visualização: Como escolher corretamente os gráficos
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
A escolha de gráficos para a elaboração de relatórios continua a ser uma questão complexa. Foram escritos dezenas de livros sobre este tema, compilados catálogos de visualizações e elaborados esquemas (os chamados chart choosers) para sugerir qual o gráfico a escolher para os teus dados. No entanto, o que parece correto em teoria pode parecer pouco atrativo, desproporcionado ou simplesmente desagradável para o cliente do relatório quando aplicado a dados reais. Nestes casos, as melhores práticas cedem à opinião subjectiva ou a modelos familiares. A simples referência ao "livro certo" não é suficiente; tens de convencer os teus utilizadores porque é que um determinado gráfico transmite melhor o significado dos dados.
E há outra questão. Para os verdadeiros analistas, a forma mais compreensível de apresentar dados é através de tabelas. Os analistas estão profundamente imersos no significado dos dados e não precisam de gráficos. Talvez também já te tenhas encontrado numa situação em que não te importas com o formato dos dados - quer seja um gráfico de barras, um gráfico circular ou uma tabela - desde que o gestor deixe de te incomodar com as suas "imagens bonitas". Mas compreendemos que a visualização ajuda a perceber a informação mais rapidamente, especialmente para aqueles que não olham ...
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