[Rivet] Minor analysis changes

[Frank Siegert]

Hi Gavin,

On 04/01/11 14:23, Gavin Hesketh wrote:
> A request: there are several analyses the plot differential cross
> sections like sigma(Z+jet) / sigma (Z). It would be very useful to also
> store sigma(Z) for these analyses (this is actually essential
> information to uses these analyses with alpgen).

Could you explain that a bit further? Do you need this to add up the (in 
Alpgen) separate multiplicity runs manually later on?

Cheers,
Frank