Re: Histograms that include empty bins

[Ethan A M. <me...@uw...>]

Not sure I understand what kind of plot you are aiming for,
and you don't give an example of the real data format,
but how about initializing all the bins to zero?

# initialize a bunch of bins to zero
  set print $BINS
  do for [i=1:10] { print i, 0.0 }
  unset print
# add the real data to those same bins
  set table $BINS append
  plot DATA using (histbin($1)):(1.0) with table
  unset table
# now plot the data as before
  plot $BINS using 1:2 smooth freq with boxes fill solid border lt -1

	Ethan


On Sunday, 25 July 2021 17:20:13 PDT Dima Kogan wrote:
> Hi. I just tried to patch gnuplot to do something that I thought would
> be simple, but it actually looks like it wouldn't be. Can I get a
> suggestion?
> 
> I'm making a simple histogram. This works as expected:
> 
> set boxwidth 1
> histbin(x) = floor(0.5 + x)
> plot '-' using (histbin($1)):(1.0) smooth freq with boxes fill solid border lt -1 
> 1
> 2
> 4
> 5
> e
> 
> Here I get 4 bins of width 1, centered at 1, 2, 4, 5. Notably, there's a
> gap: there's no bin centered at 3. Internally, gnuplot omits this bin
> entirely, instead of producing an empty bin. This matters if you make a
> this plot "with linespoints" instead of "with boxes". I want a plot that
> includes the point (3,0), but the current code doesn't include that
> point. Is there an obvious way to include that?
> 
> Thanks!