set title 'Histograms'
set size 0.8,0.8
set origin 0.1,0.1

set xrange [0:100]
set nokey
plot 'H10' u 1:2 w boxes 7, 'H10' u 1:3 w l 
replot 'H65' u 1:2 w boxes, 'H65' u 1:3 w l
pause -1 'ready'

set multiplot
set size 0.8,0.34
set origin 0.1,0.57
set title 'Histograms (X=10)'
plot 'H10' u 1:2 w boxes 7, 'H10' u 1:3 w l 
set origin 0.1,0.07
set title 'Histograms (X=65)'
plot 'H65' u 1:2 w boxes 3, 'H65' u 1:3 w l 4
unset multiplot

pause -1 'ready'
set size 0.8,0.8
set origin 0.1,0.1

set key bottom right
set title 'Cumulative counts' 
plot  'H10h' u 1:6 t 'X=10' w l 7 , 'H65h' u 1:6 t 'X=65' w l 3

pause -1 'ready'

set title 'Cumulative frequencies' 
plot  'H10h' u 1:($6/25.0)  t 'X=10'  w l 7 ,  'H65h' u 1:($6/23.0)  t 'X=65'  w l 3