摘要: In their 2017 book “R for Data Science“, Grolemund and Wickham state that data.table is recommended instead of dplyr when working with larger datasets 阅读全文
posted @ 2018-04-09 11:58 payton数据之旅 阅读(464) 评论(0) 推荐(0) 编辑
摘要: If your primary objective is to query your data in Hadoop to browse, manipulate, and extract it into R, then you probably want to use SQL. You can wri 阅读全文
posted @ 2018-04-09 11:55 payton数据之旅 阅读(232) 评论(0) 推荐(0) 编辑