אני רוצה להסיר שורות זהות בתנאי שהן צמודות זו לזו. איך עושים זאת?
למשל
x="a"y=c(1, 2, 2, 2, 3, 2, 2, 3)
df<-data.frame(x,y)
x y 1 a 1 2 a 2 3 a 2 4 a 2 5 a 3 6 a 2 7 a 2 8 a 3
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