[Rivet] Bug in analysis MC_GENERIC

[Andy Buckley]

On 02/07/14 23:08, Andy Buckley wrote:
> On 30/06/14 21:36, Carsten Bittrich wrote:
>> Hi,
>>
>> while upgrading from Rivet 1.8.3 to 2.1.1 I was recently trying to use the built-in analysis MC_GENERIC. While the analysis itself runs correctly I had some troubles generating the plot from the Rivet.yoda file. Somehow only 3 of the 17 plots are generated.
>> I attached the Rivet.yoda file for reproduction of this issue.
> 
> Hi Carsten,
> 
> I just tried your Rivet.yoda file and all of the 17 histograms plotted
> fine. Can you please provide more information about what you did and how
> it went wrong, e.g. with the error messages you received and letting us
> know which plots did/didn't work?

One of the other developers has told me that they got YODA exception
errors when trying to plot your file. I recently made some changes to
how YODA creates x,y values and errors where there are not enough stats
in a bin to calculate a correct mean or variance -- for now setting them
to zero but maybe later we'll do something cleverer.

Maybe these changes are what helped: if you want, you could try out the
development head of YODA, but hopefully we will make a new stable
release with this feature (and others) fairly soon.

Andy

-- 
Dr Andy Buckley, Royal Society University Research Fellow
Particle Physics Expt Group, University of Glasgow / PH Dept, CERN