sPHENIX discussion of software

[Chris Pinkenburg <pinkenburg AT bnl.gov>]

if it helps - the fastjet sources for our version is under

/phenix/u/phnxbld/workarea/sPHENIX/fastjet-3.2.1

the message comes from:
/phenix/u/phnxbld/workarea/sPHENIX/fastjet-3.2.1/src/PseudoJet.cc

//----------------------------------------------------------------------
// the following ones require a computation of the area in the
// associated ClusterSequence (See ClusterSequenceAreaBase for details)
//----------------------------------------------------------------------

#ifndef __FJCORE__

//----------------------------------------------------------------------
// if possible, return a valid ClusterSequenceAreaBase pointer; otherwise
// throw an error
const ClusterSequenceAreaBase * PseudoJet::validated_csab() const {
  const ClusterSequenceAreaBase *csab = dynamic_cast<const 
ClusterSequenceAreaBa
se*>(validated_cs());
  if (csab == NULL) throw Error("you requested jet-area related 
information, but the PseudoJet does not have associated area information.");
  return csab;
}

If I interpret this correctly we have to tell fastjet at some point 
explicitly to calculate the area (or do it yourself somewhere)

Chris

On 05/17/2017 05:13 PM, Perepelitsa, Dennis wrote:
> Hi Rosi,
>
> To understand what you’re doing, is there a git commit (or a text file with 
> diffs, or a pointer to a working version) we could look at? I think that 
> would help me, at least, better understand the problem...
>
> Dennis
>
> > On May 17, 2017, at 2:30 PM, Rosi Reed <rjr215 AT lehigh.edu> wrote:
> >
> > Hello All,
> >
> > I am implementing the STAR/ALICE background subtraction algorithm in
> > sPHENIX and ran into an issue that I am sure is rather simple, but I
> > am not sure what to do about it.
> >
> > For this algorithm, I need to get the area of the jet.  Normally I
> > access this from a vector of pseudo jets via:
> > jets[i].area()
> >
> > I have added all the necessary machinery (and it compiles, thanks to
> > Chris!) but when I run the fun4all macro, I get the error:
> > fastjet::Error:  you requested jet-area related information, but the
> > PseudoJet does not have associated area information.
> >
> > Any thoughts?  (Yes, I changed FastJetAlgo.C)
> >
> > Cheers,
> > Rosi
> >
> >
> >
> > --
> > Rosi Reed
> > Assistant Professor, Physics Department
> > Lehigh University
> > (610)758-3907
> > 16 Memorial Drive East Office 406
> > Bethlehem, PA 18015
> > _______________________________________________
> > sPHENIX-jet-structure-l mailing list
> > sPHENIX-jet-structure-l AT lists.bnl.gov
> > https://lists.bnl.gov/mailman/listinfo/sphenix-jet-structure-l
> Dennis V. Perepelitsa
> Assistant Professor, Physics Department
> University of Colorado Boulder
>
>
>
> _______________________________________________
> sPHENIX-software-l mailing list
> sPHENIX-software-l AT lists.bnl.gov
> https://lists.bnl.gov/mailman/listinfo/sphenix-software-l


--

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

Christopher H. Pinkenburg      ; pinkenburg AT bnl.gov

Brookhaven National Laboratory ; phone: (631) 344-5692
Physics Department Bldg 510 C  ; fax:   (631) 344-3253
Upton, NY 11973-5000

http://www.phenix.bnl.gov/~pinkenbu/

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