[Rivet] HepMC in human readable format

[Andy Buckley]

Hi Hannes,

Why on earth would Rivet have a "print event like PYTHIA" function? The
access to the GenEvent object with all the structure is one function
call away from Rivet::Event -- is that really "complicated and difficult"?!

We've tried to provide nicer ways than HepMC itself to access event
details -- iterating over particles, for example, is far easier than in
native HepMC. But our emphasis is on the histogrammed output more than
what's printed out to the terminal... and far more on the final state
and hadron relationships than the internal HepMC structure.

Other than the HepMC print and IO_AsciiParticles functions (and reading
the ASCII format), there are also a few graphical visualisation tools,
e.g. mcviz, that might be of interest.

Cheers,
Andy


On 07/08/12 21:27, Hannes Jung wrote:
> Dear Andy et al
> 
> thanks a lot for your reply.
> 
> It's really fascinating, how complicated and difficult very trivial things are in Rivet.
> It must be a MUST, that one can print out the HEPMC record in a readable format...
> but it seems I can only get it via 
> event.genEvent().print()
> but then the format is cryptic.
> 
> How do you people check, if selections etc are correct, if there is no way to printout
> what comes from the MC ?
> 
> It would be really very good if this could be provided.... I tried to do it, but failed
> due to my ignorance in the Rivet structure... so if anyone can help there, I would
> be really, really very happy....
> 
> I try to promote Rivet for our summer-students.... so.........
> 
> Thanks a lot
> 
> cheers
> Hannes
> 
> On 07.08.2012, at 17:07, Andy Buckley wrote:
> 
>> It's really a HepMC thing: Rivet doesn't include any special printout
>> formatting for GenEvents. The best I can think of offhand is, if you
>> have a Particle p, to use p.genParticle().print(). Any other HepMC
>> library function can also be used on the p.genEvent() reference.
>>
>> Hope that helps,
>> Andy
>>
>>
>> On 07/08/12 15:18, Hannes Jung wrote:
>>> Dear Rivet developers
>>>
>>> I was wondering, whether there is an easy way to print out the HepMC
>>> record in human readable format within Rivet, so that one can see
>>> directly the event one is analyzing ?
>>>
>>> Probably I have just not found the proper place, where this is
>>> described... any hint would be great...
>>>
>>> thanks a lot
>>>
>>> cheers
>>> Hannes
>>>
>>>
>>> ***********************************************************************
>>> Hannes Jung 
>>> Email: Hannes.Jung at desy.de <mailto:Hannes.Jung at desy.de> 
>>> mobile :+49 40 8998 93741
>>> http://www.desy.de/~jung                                           
>>> Tel: +49 (0) 40 8998 3741         
>>> Fax: +49 (0) 40 8998 3093 
>>> DESY, CMS 01B/02.213
>>> Notkestr.85, 22603 Hamburg, FRG   
>>> ***********************************************************************
>>>
>>>
>>>
>>>
>>>
>>>
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>>
>>
>> -- 
>> Dr Andy Buckley, SUPA Advanced Research Fellow
>> Particle Physics Expt Group, University of Edinburgh
>>
>> The University of Edinburgh is a charitable body, registered in
>> Scotland, with registration number SC005336.
>>
> 
> ***********************************************************************
> Hannes Jung 
> Email: Hannes.Jung at desy.de 
> mobile :+49 40 8998 93741
> http://www.desy.de/~jung                                           
> Tel: +49 (0) 40 8998 3741         
> Fax: +49 (0) 40 8998 3093 
> DESY, CMS 01B/02.213
> Notkestr.85, 22603 Hamburg, FRG   
> ***********************************************************************
> 
> 
> 
> 
> 


-- 
Dr Andy Buckley, SUPA Advanced Research Fellow
Particle Physics Expt Group, University of Edinburgh

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.