如何在R中水平连接两个表并匹配两个不同的列名？

merge(x, y, by.x, by.y)

df1 <- data.frame(ID = c(1, 2, 3),
                  Name = c("Alice", "Bob", "Charlie"),
                  Score = c(90, 85, 95))

df2 <- data.frame(StudentID = c(1, 2, 3),
                  Subject = c("Math", "English", "Science"),
                  Grade = c("A", "B", "A+"))

merged_df <- merge(df1, df2, by.x = "ID", by.y = "StudentID")

  ID    Name Score Subject Grade
1  1   Alice    90    Math     A
2  2     Bob    85 English     B
3  3 Charlie    95 Science    A+