Replace ROOT's TString::Tokenize() + TObjArray/TObjString token
handling with the dependency-free PStringUtils::Split() across all
command/theory parsing in PFitter (GetPhaseParams, GetParFromFun,
CheckCommands and the Execute* helpers). Split() mirrors Tokenize()
semantics (delimiter-set, skips empty tokens), so token counts and
indices are unchanged. Each token is still copied into a TString,
so the downstream Atoi/Atof/IsFloat/IsDigit/Contains/CompareTo logic
stays as-is.
Using a std::vector<std::string> removes the manual TObjArray
cleanup and incidentally fixes three pre-existing leaks: the
tokens array in ExecuteFitRange was never freed, and the early
return paths in ExecutePrintLevel and the SECTOR check in
CheckCommands skipped the cleanup.
Build of libPMusr and musrfit is clean; full ctest suite passes
(85/85).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This patch fixes compilation errors that arise with recent ROOT versions (e.g., 6.34.02),
which require a ROOT::Minuit2::MnStrategy object to be passed when initializing the
ROOT::Minuit2::MnX (X = Migrad, Simplex, Minimize) minimizers (i.e., instead of the integer
representing the "strategy").
This patch adds routines for writing a comprehensive set of fit results (i.e., parameter values, parabolic errors, asymmetric errors, covariances, correlation coefficients, etc.) for an individual `.msr` file to an easy-to-read/parse `.yaml` file.
The main motivation for the code addition is to provide users with easy access to the fit's covariance matrix without the need for "extra" manual effort (e.g., parsing the contents of `MINUIT2.OUTPUT` or `MINUIT2.root`). The other fit quantities are also included for completeness.
Reading/accessing the output is trivial using, for example, the PyYAML Python library (https://github.com/yaml/pyyaml):
```python
import yaml
with open("2125_tf_histo.yaml", "r") as fh:
results = yaml.load(fh, Loader=yaml.SafeLoader)
cov = results["covariance"]["Field_1"]["Sigma_1"]
```
Note: the naming conventions chosen for the blocks in the `.yaml` output closely follow those used by the iminuit Python library (https://github.com/scikit-hep/iminuit).
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