...

We discuss PSHist - the histogramming package for PSANA project.

Objectives

In PSANA framework we need in package which allows to accumulate data in form of histograms and tuples and save them in file for further analysis. Though it might be based on well-known underlying packages like ROOT, HBOOK, or HippoTuple, we prefer to use an uniform interface with abstract base class, substituting the direct interaction with underlying methods. This intermediate abstract layer provides a flexibility in implementation of new things, for example multithreding in analysis, which algorithm is not yet defined.

...