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set terminal svg size 900, 500
set output "restrict_post_smooth8.svg"
set xlabel "Grid points"
set ylabel "Residual value"
set title "Smoothing"
set key outside
set key autotitle columnhead
set pointsize 0.5

plot "restrict_post_smooth.data" index  13 using 1:2 with linespoints lt 5 lw 1