我有两列这样的值:
>bb
GDis BDis
1 12.291488 8.009909
2 11.283319 13.625103
3 6.674549 8.629232
4 13.493121 17.175888
5 9.550731 9.867878
6 9.193895 9.785301
7 10.541702 10.941371
8 9.849527 9.496284
9 8.682287 8.133774
10 8.439381 4.335260
我需要添加额外的列，并将其命名为
Index，如果GDis/BDis较大，它将计算比率GDis；如果BDis/GDis较大，则会计算BDis。我怎么做？
最佳答案
尝试
transform(bb, Index=ifelse(GDis>BDis, GDis/BDis, BDis/GDis))
# GDis BDis adn
#1 12.291488 8.009909 1.534535
#2 11.283319 13.625103 1.207544
#3 6.674549 8.629232 1.292856
#4 13.493121 17.175888 1.272937
#5 9.550731 9.867878 1.033207
#6 9.193895 9.785301 1.064326
#7 10.541702 10.941371 1.037913
#8 9.849527 9.496284 1.037198
#9 8.682287 8.133774 1.067436
#10 8.439381 4.335260 1.946684