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Re: Covariance Matrices in RhoCandidates [message #16235 is a reply to message #16042]

Fri, 04 April 2014 16:09

Ralf Kliemt
Messages: 508
Registered: May 2007
Location: GSI, Darmstadt

first-grade participant

From: *pool.mediaWays.net

Hello Simon,

You could go with the track parameters defined at the "first" hit of the measured trajectory:

PndPidCandidate* pidCand = (PndPidCandidate*)cand->GetRecoCandidate();
PndTrack* track = ( PndTrack* ) tca->At ( pidCand->GetTrackIndex() );

FairTrackParP* firstpar = track->GetParamFirst();

Then access the things via: GetX(), GetDX(), GetPx(), GetDPx() (and the other coordinates similar).
Header of FairTrackPar: here.

For the non-diagonal elements, i.e. the covariance matrix:

Double_t fistparCov[6][6];
firstpar->GetMARSCov(firstparCov); //cov is being filled here

If you want to access the prefit do this:

PndTrackCand* mytcand = track->GetTrackCandPtr();

Cheers
Ralf

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[Message index]

		Covariance Matrices in RhoCandidates By: SHenssler on Tue, 25 March 2014 14:51
		Re: Covariance Matrices in RhoCandidates By: Ralf Kliemt on Tue, 25 March 2014 16:24
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Tue, 25 March 2014 16:43
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Tue, 25 March 2014 17:22
		Re: Covariance Matrices in RhoCandidates By: Ralf Kliemt on Tue, 25 March 2014 17:39
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Tue, 25 March 2014 22:13
		Re: Covariance Matrices in RhoCandidates By: Ralf Kliemt on Wed, 26 March 2014 08:01
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Wed, 26 March 2014 09:26
		Re: Covariance Matrices in RhoCandidates By: Ralf Kliemt on Fri, 28 March 2014 13:35
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Thu, 03 April 2014 12:14
		Re: Covariance Matrices in RhoCandidates By: Ralf Kliemt on Fri, 04 April 2014 16:09
		Re: Covariance Matrices in RhoCandidates By: StefanoSpataro on Fri, 04 April 2014 16:17
		Re: Covariance Matrices in RhoCandidates By: Ralf Kliemt on Fri, 04 April 2014 16:21
		Re: Covariance Matrices in RhoCandidates By: StefanoSpataro on Wed, 16 April 2014 18:01
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Wed, 16 April 2014 19:37
		Re: Covariance Matrices in RhoCandidates By: StefanoSpataro on Wed, 16 April 2014 22:02
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Thu, 17 April 2014 10:08
		Re: Covariance Matrices in RhoCandidates By: StefanoSpataro on Thu, 17 April 2014 10:13
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Thu, 17 April 2014 13:10
		Re: Covariance Matrices in RhoCandidates By: StefanoSpataro on Thu, 17 April 2014 13:43
		Re: Covariance Matrices in RhoCandidates By: SHenssler on Thu, 17 April 2014 13:58

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