Today’s HEP data analysis tool - the “Physics Analysis Workstation”
PAW - developed over many years “in house”
Data managed by the ZEBRA package, which uses the OS filesystem to store
- binary “nTuples” files. nTuples are a tabular representation of physics data, stored in “row-wise” or “column-wise” format on disk/tape
- binary “histogram” files. Histograms are bins of data with associated labelling, error bars, fit parameters, etc.
- ASCII data such as vectors or columns of results
Data analysed by packages from the CERN Program Library, integrated into the system:
- fitting (MINUIT), smoothing, array manipulation (SIGMA), F77 interpretation (COMIS) etc.
Data presented as nD plots