[r] Remove duplicated rows

the general answer can be for example:

df <-  data.frame(rbind(c(2,9,6),c(4,6,7),c(4,6,7),c(4,6,7),c(2,9,6))))



new_df <- df[-which(duplicated(df)), ]

output:

      X1 X2 X3
    1  2  9  6
    2  4  6  7

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