# set terminal pngcairo  transparent enhanced font "arial,9" fontscale 1.0 size 600, 400 
# set output 'param.6.png'
set dummy t, y
set key bmargin center horizontal Right noreverse enhanced autotitle box linetype -1 linecolor -1 linewidth 1.000
set parametric
set samples 160, 160
set style data lines
set trange [ 1.00000e-05 : 3.00000 ] noreverse nowriteback
set xrange [ -5.00000 : 5.00000 ] noreverse nowriteback
set yrange [ -5.00000 : 5.00000 ] noreverse nowriteback
plot t,log(t),-t,log(t),sin(t),t**2,-sin(t),t**2