Recently I have been using gnuplot to plot position data over time. In my datafile, I have time,positional (2D) information, and directional information (in the form of degrees, 0-360). I have nice plots of position wrt to time, however, I was wondering if it's possible to plot degrees as a rotation of individual plot characters. Does anyone have any suggestions for a way to do this?
here is the example script that I am plotting. In this plot there are three files, and 3 data sets. Each containing position and time information, and representing data from a different antenna type. columns 3 and 2 contain position information, and column 1 contains time information.
gnuplot> plot 'gpsfile1.txt' using 3:2:1 ls 1 lc palette title 'smallant', 'gpsfile2.txt'
using 6:5:4 ls 5 lc palette title 'FullWave', 'ant_lady_dog_clouds.txt' using 9:8:7 ls 7 lc palette title 'control'
plotted, this data looks like this
I have a 4th column that represents orientation from magnetic north. I would like to know if there is a good way to display this 4th dimension, preferably by rotating the markers. Any thoughts?