apache-spark - How to do map and reduce in SparkR

Question

How do I do map and reduce operations using SparkR? All I can find is stuff about SQL queries. Is there a way to do map and reduce using SQL?

Answer 1

有关示例（问题本身），请参阅编写从 SparkR:::map 返回的 R 数据帧。总之，sph21所指的博文已经过时了。截至目前，map 和 reduce 都作为私有方法隐藏在 SparkR 中 - 有解决该问题的公开票证。