set output 'spec_m33.ps' 
set term postscript enhanced color 'Helvetica,18'  
set grid 
set key top right 
set xlabel 'Wavelength (Angstroms) ' 
set ylabel 'Intensity (arbitrary scale) ' 
set title 'Spectrum of galaxy B 
plot [3500:8000][] 'm33_spec.dat' using ($1):($2)   with lines lc 3 lw 2 t ''   
set output 
quit 
