# set terminal svg size 600,400 dynamic enhanced fname 'arial'  fsize 10 mousing name "param_1" butt solid 
# set output 'param.1.svg'
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"