# set terminal pngcairo  background "#ffffff" font "arial,10" fontscale 1.0 size 500, 300 
# set output 'image2.21.png'
set title "Binary data specified at the command line, intended for use through pipe" 
set xrange [ -1.50000 : 3.50000 ] noreverse nowriteback
set yrange [ -1.50000 : 3.50000 ] noreverse nowriteback
set cbrange [ 0.00000 : 1.00000 ] noreverse nowriteback
plot '-' binary endian=little array=(2,2) dx=2 format="%float" using 1:2:3 with rgbimage,     '-' binary endian=little record=4 format="%char" using 1:2 with points pt 7 ps 2 lt -1