set terminal cairolatex pdf size 2.5in,2.5in
set output 'trajectories.tex'
set linetype 1 lc rgb '#E41A1C' pt 7 ps 0.3
set linetype 2 lc rgb '#377EB8' pt 7 ps 0.3
set linetype 3 lc rgb '#4DAF4A' pt 7 ps 0.3
set linetype 4 lc rgb '#984EA3' pt 7 ps 0.3

set size square
set xrange [-0.6:0.6]
set yrange [-0.6:0.6]
set object 1 rectangle from -0.5,-0.5 to 0.5,0.5 dt 2
#set key outside top center horizontal
unset key
unset xtics
unset ytics
#set xlabel "x [m]"
#set ylabel "y [m]"

plot 'traj_1.dat' using 2:3 with lines lt 1 title 'Particle 1', \
    'traj_2.dat' using 2:3 with lines lt 2 title 'Particle 2', \
    'traj_3.dat' using 2:3 with lines lt 3 title 'Particle 3'