scikit-hep/iminuit v1.4.0

on GitHub

This release drops Python 2 support and modernizes the interface of iminuit's Minuit object to make it more pythonic. Outdated methods were deprecated and replaced with properties. Keywords in methods were made more consistent. The deprecated interface has been removed from the documentation, but is still there. Old code should still work (if not please file a bug report!).

Bug-fixes

• Fixed an exception in the rich display when results were NaN
• Minuit.migrad_ok() (now replaced by Minuit.accurate) now returns false if HESSE failed after MIGRAD and made the minimum invalid
• Running Minuit.hesse() now properly updates the function minimum
• Fixed incorrect hess_inv returned by iminuit.minimize
• Fixed duplicated printing of pedantic warning messages

Deprecated

• Minuit.list_of_fixed_params(), Minuit.list_of_vary_params(): use Minuit.fixed
• Minuit.migrad_ok(): use Minuit.valid
• Minuit.matrix_accurate(): use Minuit.accurate
• Minuit.get_fmin(): use Minuit.fmin
• Minuit.get_param_states(): use Minuit.params
• Minuit.get_initial_param_states(): use Minuit.init_params
• Minuit.get_num_call_fcn(): use Minuit.ncalls_total
• Minuit.get_num_call_grad(): use Minuit.ngrads_total
• Minuit.print_param_states(): use print() on Minuit.params
• Minuit.print_initial_param_states(): use print() on Minuit.init_params
• Minuit.hesse(maxcall=...) keyword: use ncall=... like in Minuit.migrad()
• Minuit.edm: use Minuit.fmin.edm

New features

• iminuit now uses the PDG formatting rule for quantities with errors
• slicing and basic broadcasting support for Minuit.values, Minuit.errors, Minuit.fixed, e.g. the following works: m.fixed[:] = True, m.values[:2] = [1, 2]
• Minuit.migrad(ncall=0) (the default) now uses MINUITs internal heuristic instead of a flat limit of 10000 calls
• iminuit.minimize now supports the tol parameter
• Minuit now supports print_level=3, which shows debug level information when MIGRAD runs
• Binder support and Binder badge for tutorial notebooks added by @matthewfeickert

Documentation

• New tutorials on error computation and on using automatic differentiation