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tp4664069p4664107
2013 Apr 12
1
Removing rows that are duplicates but column values are in reversed order
Hi,
From your example data,
dat1<- read.table(text="
id1?? id2?? value
a????? b?????? 10
c????? d??????? 11
b???? a???????? 10
c????? e???????? 12
",sep="",header=TRUE,stringsAsFactors=FALSE)
#it is easier to get the output you wanted
dat1[!duplicated(dat1$value),]
#? id1 id2 value
#1?? a?? b??? 10
#2?? c?? d??? 11
#4?? c?? e??? 12
But, if you have cases like the one