Writing arrays of TH1F to a file

From: Norbert Danneberg (norbert.danneberg@psi.ch)
Date: Wed Jan 05 2000 - 15:27:38 MET 

HI ,

I am writing an Object (MTMuSRAnalysis) which contains a 2-dim  array of
TH1F to a file.
When I read this object back from disk I get the error :

Error in <TBuffer::ReadObject>: got object of wrong class
Error in <TBuffer::ReadObject>: got object of wrong class

This problem does not exist in the case of one dimensional arrays of
histograms.

Do I have to write a custum streamer function ?

Cheers,

Norbert



class MTMuSRAnalysis: public MTAnalysis
{
private:
  Float_t FoilZ; // Z Position of the Foil
  TH1F* hSpinAngleCut[256][16]; //!
  TH1F* hSpinAnglePhi;
  TH1F* hSpinAngleDiv[256][16]; //

public:
  MTMuSRAnalysis(){;}
  MTMuSRAnalysis(Text_t* Name, Text_t* Title, TTree* tree);
 ~MTMuSRAnalysis(){;}

  ClassDef(MTMuSRAnalysis,1) // Muon Spin Rotation Analysis
};

--

Norbert Danneberg

ETH Zurich - Institute for Particle Physics
  Laboratory for Nuclear Physics          Phone.: +41-1-633-2034
  Hoenggerberg                            Fax.:   +41-1-633-1067
  CH-8093 Zurich


ETH Zurich - Institute for Particle Physics
  Paul Scherrer Institute                 Phone.: +41-56-310-3284
  CH-5232 Villigen PSI                    Fax.:   +41-56-310-4362

email: Norbert.Danneberg@psi.ch

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