dplyr用过滤器选择观察结果

Question

如何使用dplyr从下面的数据集中选择Giovanni Bianchi和Luca Rossi？

NAME          SURNAME   COLOR   ...
Giovanni      Rossi     Red 
Giovanni      Bianchi   Red 
Giovanni      Bianchi   Blue 
Luca          Rossi     Blue
Luca          Rossi     Red
Giovanni      Rossi     Red 

Answer 1

您可以使用paste创建全名，filter为新变量的子集

library(dplyr)

filter(d,paste(NAME,SURNAME) %in% c("Giovanni Bianchi","Luca Rossi"))

      NAME SURNAME COLOR
1 Giovanni Bianchi   Red
2 Giovanni Bianchi  Blue
3     Luca   Rossi  Blue
4     Luca   Rossi   Red

数据

d <- read.table(text="
NAME          SURNAME   COLOR
Giovanni      Rossi     Red 
Giovanni      Bianchi   Red 
Giovanni      Bianchi   Blue 
Luca          Rossi     Blue
Luca          Rossi     Red
Giovanni      Rossi     Red ",head=TRUE,stringsAsFactors=FALSE)