Rivet: Histogram paths

| Rivet 3.1.9

Functions
Histogram paths

## Functions
const std::string | Rivet::Analysis::histoDir () const
| Get the canonical histogram "directory" path for this analysis.
const std::string | Rivet::Analysis::histoPath (const std::string &hname) const
| Get the canonical histogram path for the named histogram in this analysis.
const std::string | Rivet::Analysis::histoPath (unsigned int datasetId, unsigned int xAxisId, unsigned int yAxisId) const
| Get the canonical histogram path for the numbered histogram in this analysis.
const std::string | Rivet::Analysis::mkAxisCode (unsigned int datasetId, unsigned int xAxisId, unsigned int yAxisId) const
| Get the internal histogram name for given d, x and y (cf. HepData)

## Detailed Description

Todo:
  Add "tmp" flags to return /ANA/TMP/foo/bar paths