Open a FITS file whose primary array represents a spectrum table (flux vs wavelength) and dump its columns
Author: Claudi Martinez
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Wednesday, January 27, 2021 at 08:45 AM.
We open a table from a fits file and dump its columns.
TString dir = gROOT->GetTutorialDir();
Open the table
TFITSHDU hdu(dir + "/fitsio/sample4.fits[1]");
Show columns
const auto nColumns = hdu.GetTabNColumns();
printf("The table has %d columns:\n", nColumns);
for (auto i : ROOT::TSeqI(nColumns)) {
printf(" - Column %d: %s\n", i, hdu.GetColumnName(i).Data());
}
Draw all canvases
gROOT->GetListOfCanvases()->Draw()