# set terminal svg size 600,400 dynamic enhanced fname 'arial'  fsize 10 mousing name "steps_2" butt solid 
# set output 'steps.2.svg'
set style data lines
set title "Histogram built from unsorted data by 'smooth frequency'" 
x = 0.0
plot 'hemisphr.dat' u (floor($1*20)):(1) smooth frequency with histeps