Re-extracting a slice using dplyr

Question

taking the following data

A <- c(4,4,4,5,5,5,5,6,6)
B <- c(1,2,3,1,3,4,3,2,7)

data1 <- data.frame(A,B)

I want to remove duplicate B values for each A.

So my new table should delete data1[7,]

I want to use a package dplyr()

AND have tried the following code

data2 <- data1 %>% 
  group_by(A) %>% 
  filter(slice(B(1)))

Can someone help me with the correct command filter()

+3

lukeg May 19 '15 at 15:50

1 answer

akrun · Accepted Answer · 2015-05-19T15:52:07+0000

You may try

library(dplyr)
data1 %>%
     group_by(A) %>% 
     filter(!duplicated(B))#or
     #slice(which(!duplicated(B)))