如何在R中排除group_by中的值

install.packages("dplyr")  # 安装dplyr包
library(dplyr)  # 加载dplyr包

df <- data.frame(
  group = c("A", "A", "B", "B", "C", "C"),
  value = c(1, 2, 3, 4, 5, 6)
)

df <- df %>% group_by(group)

df <- df %>% filter(group != "B")

install.packages("dplyr")  # 安装dplyr包
library(dplyr)  # 加载dplyr包

df <- data.frame(
  group = c("A", "A", "B", "B", "C", "C"),
  value = c(1, 2, 3, 4, 5, 6)
)

df <- df %>% group_by(group)
df <- df %>% filter(group != "B")

df