Dear R list, I have data on the heading kept by an animal during a migratory movement. I would like to represet this data not using a circular plot but on a xy-plot, to represent the change of kept directions over time. I have tried already to do this, but because the animal keeps always a direction between 30? and 250?, the final plot is not easily readable (the northern directions represented by 0? and 360? are represented at the opposite sides of the axis). Do you have any ideas on how to set the order of a continuos variable (from 0 to 360)in a different way for the axis of a plot? For example I would like to have an y-axis starting at 180? and ending at 179?, with 360? next to 0? (so to have values indicating the North all in the same area of the axis). Thank you in advance for any suggestion Kind regars, Giulia
Directional data in time series
2 messages · g.cerritelli, Rich Shepard
On Tue, 4 Sep 2018, g.cerritelli wrote:
I have data on the heading kept by an animal during a migratory movement. I would like to represet this data not using a circular plot but on a xy-plot, to represent the change of kept directions over time.
Giulia, Without knowing what question(s) your data are designed to answer I'll offer my opionon: map the migration. See Figure 2.3 and discussion in Bivand et al. "Applied Spatial Data Analysis with R." This might be the most effective way of communicating the migratory path. Regards, Rich