Hi there,
I want to make trajectory plots for data as follows:
ID time y
1 1 1.4
1 2 2.0
1 3 2.5
2 1.5 2.3
2 4 4.5
2 5.5 1.6
2 6 2.0
...
That is, I will plot a growth curve for each subject ID, with y in
the y axis, and time in the x axis. I would like to have all growth
curves in the same plot. Is there a simple way in R to do it? Thanks a lot!
Lei Liu
Associate Professor
Division of Biostatistics and Epidemiology
Department of Public Health Sciences
University of Virginia School of Medicine
http://people.virginia.edu/~ll9f/
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