Dear R-help mailing list,
I have this problem, I have a joint longitudinal and survival data of the form
say
ID Time Failuretime Censoringind longitudinalmeasure
1 0 35 0 123
1 10 35 0 120
1 25 35 1 123
2 0 23 0 100
2 10 23 0 111
I wish to create a new dataset such that only the first measurement is included.
Also, i will appreciate if there is a function that i could call to do this
because I will be applying it too in a simulation settings.
Thank you for your time.
James.
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