[R] to remove duplicate values
Jannis
bt_jannis at yahoo.de
Tue Jul 6 00:36:11 CEST 2010
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
>
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