[Rivet] Profile histograms in Rivet 2

[David Bjergaard]

Hi James,

(Shooting from the hip).  It looks like it wouldn't be too hard (reading
the Profile1D.h interface) to roll your own YODA->ROOT converter.  

Do you know where the code that handles Rivet->Root conversion?  If this
is athena software then I suppose this issue gets punted downstream?
Andy can better comment on what happens if ProfileBin1D::mean() is
called with no entries (in my experience it should throw an exception).
In that case it may be that this behavior has changed causing the athena
code to fail.

    Dave

James Robinson <james.robinson at cern.ch> writes:

> Dear David and Andy,
>
> Sorry about this, but I'm having another problem with my analysis'
> Rivet routine. One of the histograms is a Profile1DPtr and, although
> the .yoda output gives sensible numbers, the .root file has a TProfile
> for which all bins are 0.
>
> Obviously this isn't a problem in Rivet per se, but I guess it might
> be a problem with the athena Rivet_i interface. The only thing I can
> think of that might be weird about this histogram is that some bins
> have no entries (so a naive call to ProfileBin1D::mean() might fail).
>
> Any ideas about this one?
>
> Thanks,
> James