Changes in XMBF 2.10:
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- Added functionality for extending the bootstrap procedure such that in addition to data configurations, the fit
ranges for the variables are resampled. To this end, every "range" node can now have an optional entry called "range_bootstrap_file",
which contains the name of the file with the ranges for bootstrap. This allows the incorporation of systematic errors
due to the choices of the fitting ranges into the bootstrap distribution. See the XMBF manual for more details.
- Added functionality for specifying a step size for each fitting range. To this end, every "range" node can have a new optional entry
called "step". See the XMBF manual for more details.
- Added an option to compile a version of XMBF that uses the MPACK and QD libraries to invert
the data correlation matrix in "quad double" precision (256 bits, approx. 64 digits).
To compile this higher-precision version, install MPACK and QD, and then run "make -f Makefile_mpack_qd"
in the XMBF directory (after adjusting the library and include paths in Makefile_mpack_qd). This
generates an executable called "XMBF_mpack_qd". The quad double code is useful when the
data correlation matrix has a condition number larger than 10^16. See the XMBF manual for more details.
- Added 32 new models which allow the fitting of two-point correlators containing time-independent contributions.
See the XMBF manual for more details.
- Added the model
multi_part_exp_expE_model
which was written by W. Detmold and is intended for the fitting of multi-hadron correlation functions.
See the XMBF manual for more details. Currently, this model has no implementation of the symbolic derivatives, and therefore this model must be used
in combination with true in the "fit_settings" node.
- The calculation of avergage fit parameters at the end of the bootstrap procedure is now performed after dropping the two 16 percent
tails of the distribution
- Added the option "n_parameters_dof" in the "fit_settings" node. This specifies the number of parameters
to be subtracted from the degrees of freedom for the purpose of calculating chi^2/dof (as in QMBF). Intended for Bayesian fits.