[Rivet] HepMC in human readable format

[Hannes Jung]

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
***********************************************************************




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