如何在R中的另一列的基础上粘贴行？

# 创建一个示例数据框
df <- data.frame(A = c("apple", "banana", "orange"),
                 B = c(1, 2, 3),
                 C = c("red", "yellow", "orange"))

# 将列B的值粘贴到列A的基础上
df$A <- paste(df$A, df$B, sep = "-")

# 查看结果
df

        A B       C
1 apple-1 1     red
2 banana-2 2  yellow
3 orange-3 3  orange