# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'piecewise.1.png'
unset border
set key fixed center top vertical Left reverse enhanced autotitle nobox
set style data lines
set xzeroaxis
set yzeroaxis
set xtics axis out scale 1,8 mirror norotate  autojustify
set xtics add  (1.00000 1, 6.28319 1)
set ytics axis in scale 1,0.5 mirror norotate  autojustify
set title "Piecewise function sampling" 
set title  font ",15" textcolor lt -1 norotate
set xrange [ -2.00000 : 10.0000 ] noreverse
NO_ANIMATION = 1
plot sample [*:1] x, [1:2.*pi] cos(x), [2.*pi:10] (x-8)**2