set title "Plot of functions used to generate cut-off Wavelengths of a wave guide"
set xlabel "x"
set ylabel "Bessel"
plot "millerbessel0s.txt" using 1:2 title "J0(x)", \
"millerbessel0s.txt" using 1:3 title "J1(x)", \
"millerbessel0s.txt" using 1:4 title "J2(x)", \
"millerbessel0s.txt" using 1:5 title "J0'(x)", \
"millerbessel0s.txt" using 1:6 title "J1'(x)", \
"millerbessel0s.txt" using 1:7 title "J2'(x)"