void dump(const char *filename="lund-20170428/SAMPA_test_17-04-28-16-55-25_oddeven/results.root")
{
  //  const bool verbose = false;
  const bool verbose = true;
  const int kNch = 32;
  
  TFile *f = TFile::Open(filename);
  //  f->ls();
  
  TH1F *hn[kNch];
  char id[100];
  
  for (int ichan=0; ichan<kNch; ichan++) {
    sprintf(id, "h_noise_%d", ichan);
    hn[ichan] = (TH1F*) f->Get(id);
    
    int nbins = hn[ichan]->GetNbinsX();
    
    if (verbose) {
      printf("ch%02d: \n", ichan); 
    }
    else {
      printf("ch%02d: ", ichan); 
    }

    int ibin = 0;
    for (ibin = 1; ibin<nbins; ibin++) {
      if (verbose) {
	printf("%d %d\n", (int)hn[ichan]->GetBinCenter(ibin), (int)hn[ichan]->GetBinContent(ibin) );
      }
      else {
	printf("%d,", (int)hn[ichan]->GetBinContent(ibin) );
      }
    }

    // last bin for this channel - extra newline
    if (verbose) {
	printf("%d %d\n\n", (int)hn[ichan]->GetBinCenter(nbins), (int)hn[ichan]->GetBinContent(nbins) );
    }
    else {
      printf("%d\n", (int)hn[ichan]->GetBinContent(nbins) );
    }
  } // ichan
}