set term svg font "Arial,20" size 1024,600
set out "cspline.svg"
#set monochrome
set key out
set samples 200
set title "cspline vs gnuplot cspline vs plotutils spline -k 0"
set xlabel "x"
set ylabel "y"
plot \
 "out.txt" index 0 with points pointtype 7 title "data"\
,"out.txt" index 1 with lines title "cspline"\
,"out.txt" index 0 smooth csplines title "gnuplot"\
,"out.plotutils.txt" with lines title "plotutils"