set xrange [-1000:1000]

set yrange [-178:86]

set tics scale 0

set style line 1 lt 1 lw 2

set style line 2 lt 3 lw 2

set style arrow 1 head filled size screen 0.025,30,45 ls 1

set style arrow 2 head nofilled size screen 0.03,15 ls 2

set style arrow 3 head filled size screen 0.03,15,45 ls 1

set style arrow 4 head filled size screen 0.03,15 ls 2

set style arrow 5 heads noborder size screen 0.03,15,135 ls 1

set style arrow 6 head empty size screen 0.03,15,135 ls 2

set style arrow 7 nohead ls 1

set style arrow 8 heads size screen 0.008,90 ls 2

print ' We have defined the following arrowstyles:'

show style arrow

set for [i=1:8] arrow from -500, (-90 - i * 10) to 500, (-90 - i * 10) as i

set for [i=1:8] label sprintf('arrowstyle %i:', i) at -520, (-90 - i * 10) right

set samples 50

set angles rad

pos(x) = 69 * sin(0.01 * x)

len(x) = 49 * sin(0.01 * x + pi/2)

do for [i=1:8] {

set title sprintf('Top: plot with vectors arrowstyle %i, Bottom: explicit arrows', i)

plot '+' using 1:(pos(x)):(0):(len(x)) notitle with vectors arrowstyle i

pause -1 "Hit return to continue"

}

#reset

#

# Show plot with data style vectors

#

set title "Plot 'file' with vectors <arrowstyle>"

set key box opaque

set xrange [*:*]

set yrange [*:10]

set for [i=1:8] style arrow i lc i

plot '1.dat' using 1:2:(+1):(+1) with vectors lt 4 filled title 'filled', \

'2.dat' using 1:2:(+1):(+1) with vectors lt 1 heads title 'double-headed', \

'2.dat' using ($1):(2-$2/3):(+1):(+2.5):(int($0)%8 + 1) with vectors as var ti 'arrowstyle variable'

#

pause -1 "Hi return to continue"

#

reset