# set terminal pngcairo  background "#ffffff" enhanced font "arial,8" fontscale 1.0 size 540, 360 
# set output 'rgbalpha.1.png'
set bar 1.000000 front
set style circle radius graph 0.02, first 0.00000, 0.00000 
set style ellipse size graph 0.05, 0.03, first 0.00000 angle 0 units xy
set key title "Plot style rgbalpha" center
set key at screen 0.75, 0.75, 0 left bottom vertical Left noreverse enhanced autotitle nobox
set key noinvert samplen 1 spacing 1 width -7 height 0 
set object  1 rect from screen 0, 0, 0 to screen 1, 1, 0
set object  1 behind clip lw 1.0  dashtype solid fc  rgb "grey10"  fillstyle   solid 1.00 noborder
set style textbox transparent margins  1.0,  1.0 border
unset logscale
set samples 128, 128
set size ratio 0.95 1,1
set style data lines
unset paxis 1 tics
unset paxis 2 tics
unset paxis 3 tics
unset paxis 4 tics
unset paxis 5 tics
unset paxis 6 tics
unset paxis 7 tics
set xrange [ 0.00000 : 128.000 ] noreverse nowriteback
set yrange [ 0.00000 : 128.000 ] noreverse nowriteback
set paxis 1 range [ * : * ] noreverse nowriteback
set paxis 2 range [ * : * ] noreverse nowriteback
set paxis 3 range [ * : * ] noreverse nowriteback
set paxis 4 range [ * : * ] noreverse nowriteback
set paxis 5 range [ * : * ] noreverse nowriteback
set paxis 6 range [ * : * ] noreverse nowriteback
set paxis 7 range [ * : * ] noreverse nowriteback
set lmargin at screen 0.1
set bmargin at screen 0.1
set tmargin at screen 0.9
set colorbox vertical origin screen 0.9, 0.2, 0 size screen 0.05, 0.6, 0 front  noinvert bdefault
x = 0.0
## Last datafile plotted: "lena.rgb"
plot 100.*(.4+sin(x/5.)/(x/5.)) lw 5 title 'solid line',      'lena.rgb' binary array=(128,128) format="%uchar" flipy using 1:2:3:(2.*column(0))                 with rgbalpha title "Lena with linear\nalpha gradient"