set terminal pdf
set title "eigen-functions"
set output "efuns.pdf"
set xlabel "x"
set ylabel "u(x)"
set key right
set tics out
set xzeroaxis
set yzeroaxis
plot \
 "data" using "x":"u0" with lines title "u_0" \
,"data" using "x":"u1" with lines title "u_1" \
,"data" using "x":"u2" with lines title "u_2"  
set output "evals.pdf"
set title "eigen-values"
set xlabel "n"
set ylabel "E_n"
set key left
plot \
 "log" using "n":"calculated" with linespoints title "calculated" \
,"log" using "n":"exact" with linespoints title "exact"