March 2018
Intermediate to advanced
528 pages
13h 2m
Portuguese (Portugal, Brazil)
Content preview from R para Data Science
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Problemas de Joins | 191
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Exercícios
1. O que significa para um voo ter um tailnum faltante? O que os números de cau-
da que não têm um registro correspondente em planes têm em comum? (Dica:
uma variável explica aproximadamente 90% dos problemas.)
2. Filtre os voos para exibir apenas aqueles que fizeram pelo menos 100 rotas.
3. Combine fueleconomy::vehicles e fueleconomy::common para encontrar ape-
nas os registros para os modelos mais comuns.
4. Encontre as 48 horas (no curso de um ano inteiro) que tiveram os piores atra-
sos. Faça as referências cruzadas com os dados de weather. Você consegue ver
alg ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.