dplyr和tidyr简介 – 天才代写

> 数据处理两大利器：dplyr和tidyr</p> <p>### 1 dplyr 简介<br /> dplyr是Hadley Wickham设计，创建和维护的数据处理包。<br /> 它提供了一些易于使用，功能强大的函数集，方便对数据进行管理和探索。</p> <p>![](http://img.shujuren.org/pictures/ZE/5a43a41870234.png)</p> <p>dplyr常用函数：<br /> – select()：选择所需列<br /> – filter()：选择所需行<br /> – mutate()：添加新列<br /> – arrange()：改变行的顺序<br /> – summarise()：聚合操作，常与group_by()函数结合使用<br /> – group_by()：分组函数<br /> – inner_join()：内连接操作<br /> – left_join()：左连接操作<br /> – right_join()：右连接操作</p> <p>### 2 tidyr简介<br /> tidyr是Hadley Wickham创建用于数据整理的包。它通常与dplyr包结合使用。<br /> ![](http://img.shujuren.org/pictures/ZJ/5a43a4abb98da.png)</p> <p>tidyr常用函数：<br /> – gather()：宽数据转换为长数据<br /> – spread()：长数据转换为宽数据</p> <p>**参考资料：**<br /> 1 https://www.rdocumentation.org/packages/dplyr/versions/0.7.3<br /> 2 https://www.r-bloggers.com/data-manipulation-with-tidyr/</p> <p>您在阅读中，关于dplyr和tidyr包有什么见解，请评论。<br /> 关于R语言更多内容，请阅读[**R系列文章**](http://shujuren.org/article/514.html "R系列文章")。</p> <p>想加入数据人圈子，请加微信luqin360。</p> <p>————</p> </div> </article> <div 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