# set terminal pngcairo transparent enhanced font "arial,10" fontscale 1.0 size 500, 350 # set output 'param.1.png' set dummy t,y set key bmargin center horizontal Right noreverse enhanced autotitles box linetype -1 linewidth 1.000 set parametric set samples 160, 160 plot t,sin(t)/t title "t,sin(t)/t or sin(x)/x"