[R] to remove duplicate values

[Jannis]

Some further tricks will (probably) lead you to your goal. I suppose you 
use duplicated() or something similar to get an array of locations of 
the duplicated values:

pos.dup <- whcih(duplicated(value))

then do
diff.pos.dup <- diff(pos.dup)

and you get the indices to delete:

pos.delete   <- order[diff.pos.dup[which(diff.pos.dup==1)]]


I leave some tweaking to you as you perhaps have to adjust some indices 
slightly by adding or substracting 1 (I am never exactly sure how this 
diff() function turns out).


HTH
Jannis
Moohwan Kim schrieb:
> Dear R family,
>
> Suppose I have two series.
>
> order value
> 1  0.52
> 2  0.23
> 3  0.43
> 4  0.21
> 5  0.32
> 6  0.32
> 7  0.32
> 8  0.32
> 9  0.32
> 10 0.12
> 11 0.46
> 12 0.09
> 13 0.32
> 14 0.25
>
> For these two series, I figured out the way to detect the locations of
> duplicate values.
> The next thing to do is remove the repeated values except for a value
> that would not be next to each other.
> In other words, while keeping the 13th value, I want to remove
> observations from 6th to 9th.
> That is my end goal.
>
> Could you help me reach the goal?
>
> best
> moohwan
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>