Include individual as a factor in your dataset, and use ggplot2:

library(ggplot2)
ggplot(aes(x=Date, y=Distance, color=Individual), data=data) + geom_line()

ought to do it.

Jonathan


On Thu, Sep 23, 2010 at 9:31 AM, Struve, Juliane <j.struve@imperial.ac.uk>wrote:

> Sorry for posting this questions twice, but my previous question was
> accidentally sent unfinished.
>
> Dear list,
>
> I would like to create a time series plot in which the paths of several
> individuals are stacked above each other, with the x-axis being the total
> observation period of three years ( 1.1.2004 to 31.12.2007) and the y-axis
> being  some defined range[min,max].
>
> My data consist of Date/Time information and the paths of 45 individual as
> the distance from the location of release. An example data set for 2
> individuals is given below.The observation period and frequency of
> observations varies between individuals.
>
> I believe stackplot() may be able to do this task, but I am not sure how to
> handle the variable time period and frequency of observations for different
> individuals. Could someone advise if stackplot() is suitable or if there is
> a better approach or package ?
>
> Thank you very much for your time,
>
> Juliane
>
>
> Individual 1
>
> Date                    Distance [m]
>
> 2005-07-18 22:05:15 1815.798
> 2005-07-18 22:06:35 1815.798
> 2005-07-18 22:08:33 1815.798
> 2005-07-18 22:09:49 1815.798
> 2005-07-18 22:12:50 1815.798
> 2005-07-18 22:16:26 1815.798
>
> Individual 2
>
> Date                          Distance [m]
> 2006-08-18 09:53:20      0.0
> 2006-08-18 09:59:07      0.0
> 2006-08-18 10:09:20      0.0
> 2006-08-18 10:21:14   100.5
>
> Dr. Juliane Struve
> Imperial College London
> Department of Life Sciences
> Ascot, Berkshire,
> SL5 7PY, UK
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