you 'll may be interested in the drc package (a quick start would be
http://www.bioassay.dk), where you get some nice plots and can fit
appropriate models as well - very handy if you want to estimate
effective doses.
hth.
Laura Bonnett schrieb:
Hi Everyone,
I have data in a long format e.g. there is one row per patient but each
follow-up appointment is included in the row. So, a snippet of the data
looks like this:
TrialNo Drug Sex Rand Adate1 Date1 Dose1 Time1 Adate2 Date2 Dose2
Time2 B1001029 LTG M 15719 30/04/2003 15825 150 106 29/08/2003 15946 200
227 B1117003 LTG M 15734 30/04/2003 15825 200 91 03/09/2003 15951 250 217
B138015 LTG M 14923 06/02/2001 15012 225 89 08/05/2001 15103 300 180
B112003 TPM F 14914 15/01/2001 14990 60 76 05/03/2001 15039 100 125
Of course, not everyone has the same number of follow-up appointments and so
there may be some column entries that are NAs.
What I'd like to do is a dose profile i.e. a plot of time on the x-axis
agaisnt dose on the y-axis for each patient ideally colouring lines
according to drug. Does anyone know how I can do this? Someone at work has
suggested that I use plot and then loess.smooth but I don't really know what
to do.
Thank you very much for your help,
Laura
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
Eik Vettorazzi
Institut für Medizinische Biometrie und Epidemiologie
Universitätsklinikum Hamburg-Eppendorf
Martinistr. 52
20246 Hamburg
T ++49/40/42803-8243
F ++49/40/42803-7790
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
