# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'param.1.png'
set dummy t, y
set key bmargin center horizontal Right noreverse enhanced autotitle box lt black linewidth 1.000 dashtype solid
set parametric
set samples 160, 160
set style data lines
NO_ANIMATION = 1
plot t,sin(t)/t title "t,sin(t)/t or sin(x)/x"