set term svg fsize 18 background rgb "white"
set title "Gamma-function vs tabulated values
set key bottom right
set tics out
set grid
set xzeroaxis
set yzeroaxis
set xlabel "x"
set ylabel "y"
set out "Gamma.svg"
plot [][-5:5] \
 "out.gamma.txt" with lines title "gamma function"\
,"out.table.txt" with points pt 7 ps 0.7 title "tabulated values"\