如何基于R中不同数据框中的列值从一个数据框中删除行？

Question

I have this dataframe 1

Data frame 2

I would want to remove the entire rows from Data Frame 1 with the batch NO.s in Data frame 2

Final table should look like:

Answer 1

Using anti_join , which basically keeps only the rows in df1 not in df2 :

library(dplpyr)
df1 %>% 
  anti_join(df2, by = "BatchNo.")
# Joining, by = "BatchNo."        # be sure that "BatchNo." is spelled the same
# Month Place BatchNo. Passed
# 1   MAR   CAN    14824      N
# 2   OCT   GER    15842      Y
# 3   JUL   POR    13654      N

Data:

tt <- "Month Place BatchNo. Passed
FEB    NZ     12451    Y
MAR    CAN    14824    N
OCT    GER    15842    Y
JUL    POR    13654    N
MAY    ESP    12445    N"

df1 <- read.table(text=tt, header = T)

tt <- "BatchNo.  Commodity Price
12451        BUS       100
12445        CAR       200"

df2 <- read.table(text=tt, header = T)