# set terminal pngcairo  background "#ffffff" fontscale 1.0 dashed size 640, 480 
# set output 'dashcolor.2.png'
set style line 1  linetype 2 linecolor rgb "red"  linewidth 3.000 pointtype 2 pointsize default pointinterval 0
set style line 2  linetype 2 linecolor rgb "orange"  linewidth 2.000 pointtype 2 pointsize default pointinterval 0
set style line 3  linetype 2 linecolor rgb "yellow"  linewidth 3.000 pointtype 2 pointsize default pointinterval 0
set style line 4  linetype 2 linecolor rgb "green"  linewidth 2.000 pointtype 2 pointsize default pointinterval 0
set offsets 0.05, 0.05, 0, 0
set style function linespoints
set noxtics
set noytics
set title "The pointinterval property is another way to create interrupted lines" 
set xlabel "This technique works best for equally spaced data points" 
set xrange [ -0.500000 : 3.30000 ] noreverse nowriteback
set yrange [ -1.00000 : 1.40000 ] noreverse nowriteback
set bmargin  6
unset colorbox
i = 8
plot cos(x)     lt -1 pi -4 pt 6 title 'pi -4',        cos(x-.8)  lt -1 pi -3 pt 7 ps 0.2 title 'pi -3 pt 7 ps 0.2',       cos(x-.2)  lt -1 pi -6 pt 7 title 'pi -6',     cos(x-.4)  lt -1 pi -3 pt 4 title 'pi -3',     cos(x-.6)  lt -1 pi -5 pt 5 title 'pi -5',      cos(x-1.)  with line lt -1 notitle,       cos(x+.2)  with line lt -1 lw 2 title 'lw 2'