reset
set terminal png size 400,400
set output "fig_sample_vector2.png"
set border 0
set xtics 0,0,0
set ytics 0,0,0
set xtics nomirror
set ytics nomirror
set xrange [-7.0:7.0]
set yrange [-7.0:7.0]
set size square
set xzeroaxis
set yzeroaxis
set label "r=5.0m kh=0.15 H=15.0m z=0.0m" at graph 0.0,graph 0.95
set label "Direction of acceleration" at 0.5,0.7 center
set style arrow 1 size graph 0.05,20 empty linewidth 2
set arrow as 1 from -1,0 to 1,0
set style arrow 2 size graph 0.05,20 filled nohead linewidth 1 linetype 3 
set arrow as 2 from  5,-5 to  5, 5
set arrow as 2 from  5, 5 to -5, 5
set arrow as 2 from -5, 5 to -5,-5
set arrow as 2 from -5,-5 to  5,-5
set datafile separator ","
set parametric
set samples 200
plot [0:2*pi] 5*cos(t),5*sin(t) linetype 2 notitle, \
"inp_sample_vector2.txt" with vector linetype 3 notitle