[Rivet] NLOHisto1D

[Chris Pollard]

Hi all,

> This is what the "multi-event" branch does, along with handling of
> > weight vectors within each (sub)event. Take a look in
> > /hepforge/hg/rivet/private/multi-event  I'll let Chris say more about
> > the status of this -- as far as I know it's working for 1D histograms
> > and just needs a bit of technical work to generalize to wrappers on the
> > other YODA data types without masses of unmaintainable code duplication
> > -- i.e. some template or macro smartness, preferably without being too
> > clever-clever.
>
> Argh, many apologies that I completely forgot about this older thread
> in which this was mentioned already!
>

Sorry about this---several emails in this thread coincided with my
bi-weekly (!!) removal from the rivet list due to excessive bounces. Anyone
have a good solution to this?

Basically, yes: that's the status. David G did a good deal of the coding,
but I'm familiar with what is going on and have tested that the multi-event
branch yields the same results as the release-2-2-x branch with
NLO-weight-capable Histo1Ds. I haven't synced the multi-event repo in a
while though, so that probably needs to happen before we move forward.

That also reminds me that I wanted to catch Chris (and anybody else
> interested) on Skype to discuss a bit more how we can work towards
> re-entrant histogramming. I've got a lecture block just ahead of me,
> which probably means it'll be mid-June before I'll actually be able to
> spend some more time on this. Chris, I'll ping you eventually, ok?
> But anyway it's great that the counter event stuff is already in
> implementation.
>

Yes, of course. My skype ID is cspollard. There was talk of a possible
Rivet meetup/hackathon in early July to work on this. I'll let Andy chime
in on whether that's a realistic possibility.

Chris
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