set term png
set output 'fd1d_advection_diffusion_steady.png'
set grid
set style data lines
unset key
set xlabel '<---X--->'
set ylabel '<---U(X)--->'
set title 'Exact: green line, Approx: red dots'
plot 'fd1d_advection_diffusion_steady_data.txt' using 1:2 with points pt 7 ps 2,\
'' using 1:3 with lines lw 3
quit