Capture data

-----Original Message-----
From: R-sig-ecology [mailto:r-sig-ecology-bounces at r-project.org] On Behalf
Of Allan Edelsparre
Sent: Wednesday, February 08, 2017 2:43 PM
To: r-sig-ecology at r-project.org
Subject: [R-sig-eco] Capture data

Hi all,

I have two data sets I want to merge. One has a vector with trap IDs and the
vector from the other data set has the number of individuals captured at
each trap site. I need to reverse the trap ID's within the trap ID vector in
order to match the number trapped. Here is an example of how the vector
looks like:

TrapID
A01
B01
C01
A02
B02
C02
A03
B03
C03

I need the vector to look like this

C01
B01
A01
C02
B02
A02
C03
B03
A03

I can do the first chunk using this code:

rev(TrapID[seq(1, 3)])

I've tried several versions of this code including doing a for loop where I ran
each sequence through, but it never worked. Any thoughts as to how I can
do the reversal of a sequence within my vector???

Allan

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