scipy_optimizer

class pyhf.optimize.opt_scipy.scipy_optimizer(*args, **kwargs)

Bases: pyhf.optimize.mixins.OptimizerMixin

Optimizer that uses scipy.optimize.minimize().

__init__(*args, **kwargs)

Initialize the scipy_optimizer.

See pyhf.optimize.mixins.OptimizerMixin for other configuration options.

Parameters:

• tolerance (float) – Tolerance for termination. See specific optimizer for detailed meaning. Default is None.

• solver_options (dict) – additional solver options. See scipy.optimize.show_options() for additional options of optimization solvers.

Attributes

name

tolerance

solver_options

maxiter

verbose

Methods

_get_minimizer(objective_and_grad, init_pars, init_bounds, fixed_vals=None, do_grad=False, par_names=None)

_minimize(minimizer, func, x0, do_grad=False, bounds=None, fixed_vals=None, options={})

Same signature as scipy.optimize.minimize().

Minimizer Options:

• maxiter (int): Maximum number of iterations. Default is 100000.

• verbose (bool): Print verbose output during minimization. Default is False.

• method (str): Minimization routine. Default is 'SLSQP'.

• tolerance (float): Tolerance for termination. See specific optimizer for detailed meaning. Default is None.

• solver_options (dict): additional solver options. See scipy.optimize.show_options() for additional options of optimization solvers.

Returns:

the fit result

Return type:

fitresult (scipy.optimize.OptimizeResult)