# set terminal pngcairo background "#ffffff" enhanced font "arial,8" fontscale 1.0 size 540, 360 # set output 'rgbalpha.2.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 focus(x,y) = ((column(0)-x)**2 + (column(-1)-(127-y))**2) > 400 ? 0 : 255 x = 0.0 GPFUN_focus = "focus(x,y) = ((column(0)-x)**2 + (column(-1)-(127-y))**2) > 400 ? 0 : 255" ## 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:(focus(70,50)) with rgbalpha title "Lena with circular mask"