{
	char line[ 256 ];

	Float_t ftime, fpos;

	FILE *fin = fopen("tutor.prn","r");
	TFile *fout = new TFile("cdish.root","RECREATE");
	TNtuple *cdish = new TNtuple("cdish","torsion balance data","time:position");

	while( fgets( &line, 256, fin ) )
	{
	  if( line[0] != '\"' )
	    {
	      sscanf( &line, "%f %f", &fpos, &ftime );
	      cdish->Fill( ftime/60.0, fpos );
	    }
	}

	fclose( fin );

	fout->Write();
}