# set terminal pngcairo  background "#ffffff" font "arial,8" fontscale 1.0 size 600, 400 
# set output 'parallel.1.png'
unset border
set format x "axis %g"
unset key
set style data lines
set xtics border in scale 0,0 mirror norotate  autojustify
set xtics 1 norangelimit
set noytics
set title "Parallel Axis Plot" 
set title  font ",15" norotate
set autoscale xfixmin
set autoscale xfixmax
i = 5
x = 0.0
plot 'silver.dat' using 2:3:1:($3/2):2:(int($0/25)) with parallel lt 1 lc variable