set terminal svg size 500 375 fsize 16 enhanced
 set output "4-bit-linear-PCM.svg"
 set nokey
 set noborder
 set grid ytics lw 1.5 lt 1 lc rgb 'grey25'
 set ytics("–8"-8,"–7"-7,"–6"-6,"–5"-5,"–4"-4,"–3"-3,"–2"-2,"–1"-1,"0"0,"1"1,"2"2,"3"3,"4"4,"5"5,"6"6,"7"7)
 set tic scale 0
 unset xtics
 n=23
 set xrange [0:n]
 set yrange [-8:7]
 f(x)=4*(sin(2*pi*x/n)+sin(6*pi*x/n-1))
 set table 'tmp.dat'
 plot f(x)-.5
 unset table
 set samples n
 plot 'tmp.dat' w lines lw 4, floor(f(x)) w impulses lc rgb 'grey50' lw 1.5, floor(f(x)) w points pt 7 ps .8