set output 'hval_recent_b.ps' 
set term postscript color enhanced 'Helvetica,18'  
set grid 
set key  top right 
set ylabel 'H0 (km/s/Mpc) '  
set xlabel 'Years ' 
set title 'Measurements of H0 (thanks to John Huchra) '
plot [2000:2020][50:90]     './hubble_plot.dat' using ($4+0):1       with points pt 3 ps 0.5 lc rgbcolor "black"        t ''  ,    './hubble_current.dat' index 0 using ($4+0):1:2       with yerrorbars pt 6 ps 1.5 lc rgbcolor "red" lw 3       t 'inverse ladder'  ,    './hubble_current.dat' index 1 using ($4+0):1:2       with yerrorbars pt 4 ps 1.5 lc rgbcolor "blue" lw 3       t 'classic ladder'  ,    './hubble_current.dat' index 2 using ($4+0):1:2       with yerrorbars pt 4 ps 1.5 lc rgbcolor "blue" lw 3       t ''  
set output 
quit 
