[Rivet] yodamerge for Histo1D

[Frank Siegert]

Hi Leif,

Thanks for writing this up.

I was trying to understand the merging of d\sigma/dX-type histograms,
and got stuck in the "For each bin..." paragraph on page 1. I assume
there must be a sum over i missing in \sigma[b] and \delta\sigma[b]?

Anyway, in the end what I'm after, as far as I can tell, are the two
equations at the end of page 1 and beginning of page 2. The problem
here, I think, is that we don't have all the information necessary:
the total sum of weights in run i (S_{w,i}) isn't stored anywhere, is
it?

Cheers,
Frank


On 10 June 2013 11:36, Leif Lönnblad <leif.lonnblad at thep.lu.se> wrote:
> I've written down some thoughts on merging Rivet runs:
> http://home.thep.lu.se/~leif/misc/weightmerging.pdf
>
> I guess the bottom line is that to do it properly, the merging needs to be
> done before finalizing, but that in certain cases also finalized histograms
> can be handled.
>
> /Leif
>
>
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