set term svg
set out "Gamma.svg"
set xlabel "x"
set ylabel "y"
set key bottom right
set tics out
set xzeroaxis
set yzeroaxis
set title "Gamma function"
plot [-4:6][-5:5] \
	 "out.gamma.txt" with lines title "gamma" \
	,"out.gamma.test.txt" with points pt 7 title "true gamma"