Message-ID: <4946540D.5201.00C9.0@efs.mq.edu.au>
Date: 2008-12-15T01:56:45Z
From: Zhixin Liu
Subject: how to create duplicated ID in multi-records per subject dataset
Hi R helpers,
If I have a dataset looks like:
ID record
1 20
. 30
. 25
2 26
. 15
3 21
4.....................
And I want it becomes
ID record
1 20
1 30
1 25
2 26
2 15
3 21
4.....................
That is, I have to duplicate IDs for those with multiple records. I am wondering it is possible to be done in R, and I am grateful if you would like to show me the direction.
Many thanks!
Zhixin