分组插入字符串

问题描述

我有一个名为教师的数据框:

I have a dataframe called Teachers:

Teachers <- data.frame(Name = c("Mark","Mark","Peter","Richard","Clay","Clay"),
                       Pos  = c("Coord","Teacher", "Teacher", "Teacher","Coord","Teacher"))

是否有任何R基本命令会产生以下组data.frame ??

Are there any R basic commands that would produce the following group data.frame?:

Teachers2 <- data.frame(Name = c("Mark","Peter","Richard","Clay"),
                        Pos  = c("Coord/Teacher", "Teacher", "Teacher","Coord/Teacher"))

感谢您的帮助

推荐答案

paste应该做到:

library(tidyverse)
Teachers2 <- Teachers %>%
    group_by(Name) %>%
    summarise(Pos=paste(Pos,collapse="/"))

输出:

     Name           Pos
1    Mark Coord/Teacher
2   Peter       Teacher
3 Richard       Teacher
4    Clay Coord/Teacher

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