我有两个要合并的数据集.但在此之前,我想把ID递增到tail(df1$ID, n=1) + 1
,只要最后一行的df2
df1 <- data_frame(ID = c(1:4), valueA = seq(0.1,0.4,0.1), Category= "Apples" )
df2 <- data_frame(ID = "I NEED TO DEFINE", valueA = seq(0.1,0.4,0.1), Category= "Apples2")
tail(df1$ID, n=1)
预期答案
ID ValueA Category
1 0.1 Apples
2 0.2 Apples
3 0.3 Apples
4 0.4 Apples
5 0.1 Apples2
6 0.2 Apples2
7 0.3 Apples2
8 0.4 Apples2
如何绕过这一点?在此之前,我非常感谢您.