set terminal cairolatex pdf
set output "fig-gamma.tex"
set size 0.6
set tics in
set xlabel "$x$"
set ylabel "$y$"
set key bottom right
set xzeroaxis
set yzeroaxis
plot [][-5:5]\
 "out.gamma.txt" with lines title "$\\Gamma(x)$"\
,"tab.gamma.txt" with points pointtype 7 title "data"\