如何在R dataframe中替换多列中的多个值？

# 加载必要的包
library(dplyr)

# 创建示例DataFrame
df <- data.frame(
  A = c(1, 2, 3, 4),
  B = c("red", "green", "blue", "yellow"),
  C = c("apple", "banana", "orange", "grape")
)

# 查看原始DataFrame
print(df)

# 替换列A中的值：将1替换为10，将2替换为20
# 替换列B中的值：将"red"替换为"pink"，将"blue"替换为"purple"
# 替换列C中的值：将"apple"替换为"pear"，将"orange"替换为"peach"
df <- df %>% 
  mutate(
    A = ifelse(A == 1, 10, ifelse(A == 2, 20, A)),
    B = ifelse(B == "red", "pink", ifelse(B == "blue", "purple", B)),
    C = ifelse(C == "apple", "pear", ifelse(C == "orange", "peach", C))
  )

# 查看替换后的DataFrame
print(df)