example_algorithm.py

[xswcyj]

this line can't go through:
mod.invert_external(minimize, method='Nelder-Mead')

the error information is as followed:

AttributeError Traceback (most recent call last)
in
----> 1 mod.invert_external(minimize, method='Nelder-Mead')

~/miniconda3/lib/python3.5/site-packages/hazel-2018.6.7-py3.5-macosx-10.9-x86_64.egg/hazel/model.py in invert_external(self, algorithm, use_jacobian, **kwargs)
1651 tmp = algorithm(self._func_nograd, self.nodes, callback=self._callback_general, **kwargs)
1652
-> 1653 self._func_grad(tmp['x'])
1654 self._callback_general(tmp['x'])
1655

~/miniconda3/lib/python3.5/site-packages/hazel-2018.6.7-py3.5-macosx-10.9-x86_64.egg/hazel/model.py in _func_grad(self, x)
1595 self.nodes = x
1596 self.set_new_model(self.nodes)
-> 1597 self.synthesize_and_compute_rf(compute_rf=True)
1598 self.chi2, dchi2, _ = self.compute_chi2()
1599 return self.chi2, dchi2

~/miniconda3/lib/python3.5/site-packages/hazel-2018.6.7-py3.5-macosx-10.9-x86_64.egg/hazel/model.py in synthesize_and_compute_rf(self, compute_rf, include_jacobian)
1081 loop = 0
1082
-> 1083 self.hessian_regularization = np.zeros(self.n_free_parameters_cycle)
1084 self.grad_regularization = np.zeros(self.n_free_parameters_cycle)
1085

AttributeError: 'Model' object has no attribute 'n_free_parameters_cycle'