payton数据之旅

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

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