合并R中的两个数据框并追加一列

# 创建两个数据框
df1 <- data.frame(ID = c(1, 2, 3), Name = c("Alice", "Bob", "Charlie"))
df2 <- data.frame(ID = c(2, 3, 4), Age = c(25, 30, 35))

# 使用merge函数合并数据框，并追加一列
merged_df <- merge(df1, df2, by = "ID", all = TRUE)

# 输出合并后的数据框
print(merged_df)

library(dplyr)

# 创建两个数据框
df1 <- data.frame(ID = c(1, 2, 3), Name = c("Alice", "Bob", "Charlie"))
df2 <- data.frame(ID = c(2, 3, 4), Age = c(25, 30, 35))

# 使用join函数合并数据框，并追加一列
merged_df <- df1 %>% left_join(df2, by = "ID")

# 输出合并后的数据框
print(merged_df)