[Rivet] HepMC in human readable format

[Andy Buckley]

Hi Hannes,

You might find the output of the attached analysis also nice for event
visualisation purposes. I'll see if I can tidy this up to make it a
standard Rivet function in a future release.

Andy


On 10/08/12 06:08, Hannes Jung wrote:
> Hi Andy
> 
> thanks for your mail, yes would be nice to have something like this.
> Actually, I am pretty happy with what we got from the IO_AsciiiParticles,
> in the routine, which I had attached.... (I attach it again)
> 
> Thanks aanyway for looking into it..
> Cheers
> 
> Hannes
> 
> On 10.08.2012, at 00:11, Andy Buckley wrote:
> 
>> Hi Hannes,
>> 
>> I may have been incredulous about the *expectation* that Rivet would
>> contain such a function, but I do see the usefulness of one. It won't be
>> high priority, but I'll look into providing a one-liner way to do it in
>> a future release. ATLAS has some fairly nice pretty-printing code that I
>> can probably "borrow" :-)
>> 
>> I did think that this would be as simple as
>> 
>> inline void printEvent(const GenEvent& evt) {
>>    HepMC::IO_AsciiParticles ascii_io(std::cout);
>>    ascii_io.write_event(&evt);
>> }
>> 
>> but unfortunately IO_AsciiParticles does not work the same way re.
>> stream constructors as does IO_GenEvent. If only HepMC were better...
>> but we're stuck with it now!
>> 
>> Cheers,
>> Andy
>> 
>> 
>> On 09/08/12 08:50, Hannes Jung wrote:
>>> Hi Andy
>>> 
>>> to print to HepMC in a readable format is very essential
>>> for people trying to learn what the MC is doing and to understand
>>> how to do a selection for the analysis, also using Rivet just for
>>> MC studies.
>>> 
>>> We have now several summerstudents, who use Rivet as an interface
>>> to the MCs and to perform different studies. For this an understanding of
>>> the event record is important.
>>> 
>>> Anyway, as I send yesterday in my mail, we have now managed to print
>>> the HepMC record in a readable format in Rivet, so this is fine now.
>>> Maybe it could be of help also for others to have this option available.
>>> 
>>> Cheers
>>> 
>>> Hannes
>>> 
>>> 
>>> 
>>> 
>>> On 09.08.2012, at 09:26, Andy Buckley wrote:
>>> 
>>>> 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>
>>>>>>> <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   
>>>>>>> ***********************************************************************
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> _______________________________________________
>>>>>>> Rivet mailing list
>>>>>>> Rivet at projects.hepforge.org <mailto:Rivet at projects.hepforge.org>
>>>>>>> http://www.hepforge.org/lists/listinfo/rivet
>>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> -- 
>>>>>> 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 <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   
>>>>> ***********************************************************************
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>> 
>>>> 
>>>> -- 
>>>> 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 <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   
>>> ***********************************************************************
>>> 
>>> 
>>> 
>>> 
>> 
>> 
>> -- 
>> 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.

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