set terminal postscript portrait
set title "Error in solution of 2-pt BVP using O(h^2) FDA  (levels 5, 6, 7)"
set xlabel "x"
set ylabel "u_exact(x) - u(x)"
set size 0.760,1.0
set output "err567.ps"
plot "err5" t "level 5", "err6" t "level 6", "err7" t "level 7"
quit