¦ 1.1 ¦ 1.2 ¦ 1.3 ¦ 2.1 ¦ 2.2 ¦ 2.3 ¦ 3.1 ¦ 3.2 ¦ 3.3 ¦

#Suppose x.y colname
(x.y)
if x>y => delete column

¦ 1.1 ¦ 1.2 ¦ 1.3 ¦ 2.2 ¦ 2.3 ¦ 3.3 ¦