\
set term svg size 640,480 font "Arial,14";\
set out "Berrut.svg";\
set xlabel "x";\
set ylabel "y";\
set key right;\
set tics out;\
set title "Rational (Berrut) vs polynomial interpolation";\
plot [][:1.5]\
 "out.txt" index 0 with points pointtype 7 pointsize 0.5 title "data"\
,"out.txt" index 1 using 1:2 with lines title "polynomial"\
,"out.txt" index 1 using 1:3 with lines title "rational function"\