March 2018
Intermediate to advanced
528 pages
13h 2m
Portuguese (Portugal, Brazil)
Content preview from R para Data Science
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296 | Capítulo 16: Vetores
Normalmente você não precisa saber sobre esses tipos diferentes, porque sempre
pode usar NA, e ele será convertido para o tipo correto usando as regras de coerção
implícitas descritas a seguir. Contudo, há algumas funções que são rígidas sobre
suas entradas, então é útil ter esse conhecimento na manga para que você possa ser
específico quando necessário.
Exercícios
1. Descreva a diferença entre is.finite(x) e !is.infinite(x).
2. Leia o código-fonte de d plyr::n e a r() (Dica: para ver o código-fonte, retire os
()). Como ele funciona?
3. Um vetor lógico pode receber três valores possíveis. Quantos valores possíveis ...
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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.