# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'polar.1.png'
set clip points
unset border
set dummy t, y
set raxis
set polar
set polar grid 24, 10 qnorm 1  theta [0:360]  r [0:*]
set samples 160, 160
set style data lines
set xzeroaxis
set yzeroaxis
set zzeroaxis
set xtics axis in scale 1,0.5 nomirror norotate  autojustify
set ytics axis in scale 1,0.5 nomirror norotate  autojustify
unset rtics
set title "Three circles (with aspect ratio distortion)" 
set trange [ 0.00000 : 6.28319 ] noreverse
NO_ANIMATION = 1
plot .5,1,1.5