def test_target_jacobian_calculation_finite_difference(physical_param, single_exp, large_reflection_table): """Test the calculated jacobian against a finite difference calculation.""" test_params, exp, test_refl = physical_param, single_exp, large_reflection_table test_params.parameterisation.decay_term = False test_params.model = "physical" experiments = create_scaling_model(test_params, exp, test_refl) assert experiments[0].scaling_model.id_ == "physical" scaler = create_scaler(test_params, experiments, test_refl) apm = multi_active_parameter_manager([scaler.components], [["scale"]], scaling_active_parameter_manager) target = ScalingTarget() scaler.update_for_minimisation(apm, 0) fd_jacobian = calculate_jacobian_fd(target, scaler, apm) _, jacobian, _ = target.compute_residuals_and_gradients( scaler.Ih_table.blocked_data_list[0]) n_rows = jacobian.n_rows n_cols = jacobian.n_cols print(jacobian) print(fd_jacobian) for i in range(0, n_rows): for j in range(0, n_cols): assert jacobian[i, j] == pytest.approx(fd_jacobian[i, j], abs=1e-4)
def test_target_gradient_calculation_finite_difference(small_reflection_table, single_exp, physical_param): """Test the calculated gradients against a finite difference calculation.""" model = PhysicalScalingModel.from_data(physical_param, single_exp, small_reflection_table) # need to 'add_data' model.configure_components(small_reflection_table, single_exp, physical_param) model.components["scale"].update_reflection_data() model.components["decay"].update_reflection_data() apm = multi_active_parameter_manager( ScalingTarget(), [model.components], [["scale", "decay"]], scaling_active_parameter_manager, ) model.components["scale"].inverse_scales = flex.double([2.0, 1.0, 2.0]) model.components["decay"].inverse_scales = flex.double([1.0, 1.0, 0.4]) Ih_table = IhTable([small_reflection_table], single_exp.crystal.get_space_group()) with patch.object(SingleScaler, "__init__", lambda x, y, z, k: None): scaler = SingleScaler(None, None, None) scaler._Ih_table = Ih_table # Now do finite difference check. target = ScalingTarget() scaler.update_for_minimisation(apm, 0) grad = target.calculate_gradients(scaler.Ih_table.blocked_data_list[0]) res = target.calculate_residuals(scaler.Ih_table.blocked_data_list[0]) assert (res > 1e-8), """residual should not be zero, or the gradient test below will not really be working!""" # Now compare to finite difference f_d_grad = calculate_gradient_fd(target, scaler, apm) print(list(f_d_grad)) print(list(grad)) assert list(grad) == pytest.approx(list(f_d_grad)) sel = f_d_grad > 1e-8 assert sel, """assert sel has some elements, as finite difference grad should
def test_target_jacobian_calculation_finite_difference(physical_param, single_exp, large_reflection_table): """Test the calculated jacobian against a finite difference calculation.""" physical_param.physical.decay_correction = False model = PhysicalScalingModel.from_data(physical_param, single_exp, large_reflection_table) # need to 'add_data' model.configure_components(large_reflection_table, single_exp, physical_param) model.components["scale"].update_reflection_data() apm = multi_active_parameter_manager( ScalingTarget(), [model.components], [["scale"]], scaling_active_parameter_manager, ) Ih_table = IhTable([large_reflection_table], single_exp.crystal.get_space_group()) with patch.object(SingleScaler, "__init__", lambda x, y, z, k: None): scaler = SingleScaler(None, None, None) scaler._Ih_table = Ih_table target = ScalingTarget() scaler.update_for_minimisation(apm, 0) fd_jacobian = calculate_jacobian_fd(target, scaler, apm) r, jacobian, w = target.compute_residuals_and_gradients( scaler.Ih_table.blocked_data_list[0]) assert r == pytest.approx( [-50.0 / 3.0, 70.0 / 3.0, -20.0 / 3.0, 12.5, -2.5] + [-25.0, 0.0, -75.0, 0.0, 200.0]) assert w == pytest.approx( [0.1, 0.1, 0.1, 0.02, 0.1, 0.02, 0.01, 0.02, 0.01, 0.01]) n_rows = jacobian.n_rows n_cols = jacobian.n_cols print(jacobian) print(fd_jacobian) for i in range(0, n_rows): for j in range(0, n_cols): assert jacobian[i, j] == pytest.approx(fd_jacobian[i, j], abs=1e-4)
def test_multi_apm(): """Test for the general multi_active_parameter_manage class.""" components_1 = { "scale": mock_component(), "decay": mock_component(), "absorption": mock_component(), } components_2 = {"scale": mock_component(), "decay": mock_component()} multi_apm = multi_active_parameter_manager( ScalingTarget(), [components_1, components_2], [["scale", "decay"], ["scale"]], active_parameter_manager, ) # Test correct setup of apm_list attribute. for apm in multi_apm.apm_list: assert isinstance(apm, active_parameter_manager) assert len(multi_apm.apm_list) == 2 assert multi_apm.components_list == ["scale", "decay", "scale"] assert multi_apm.n_active_params == 3 assert multi_apm.apm_data[0] == {"start_idx": 0, "end_idx": 2} assert multi_apm.apm_data[1] == {"start_idx": 2, "end_idx": 3} # Test parameter selection. multi_apm.set_param_vals(flex.double([3.0, 2.5, 2.0])) assert multi_apm.get_param_vals() == flex.double([3.0, 2.5, 2.0]) assert multi_apm.select_parameters(0) == flex.double([3.0, 2.5]) assert multi_apm.select_parameters(1) == flex.double([2.0]) # Test setting parameter esds. multi_apm.set_param_esds(flex.double([0.1, 0.2, 0.3])) assert components_1["scale"].free_parameter_esds == flex.double([0.1]) assert components_1["decay"].free_parameter_esds == flex.double([0.2]) assert components_2["scale"].free_parameter_esds == flex.double([0.3]) # Test setting var_cov matrices for each component. var_cov = flex.double([1.0, 0.5, 0.5, 0.5, 2.0, 0.5, 0.5, 0.5, 3.0]) var_cov.reshape(flex.grid(3, 3)) multi_apm.calculate_model_state_uncertainties(var_cov) assert components_1["scale"].var_cov_matrix[0, 0] == 1.0 assert components_1["decay"].var_cov_matrix[0, 0] == 2.0 assert components_2["scale"].var_cov_matrix[0, 0] == 3.0
def test_target_gradient_calculation_finite_difference(small_reflection_table, single_exp, physical_param): """Test the calculated gradients against a finite difference calculation.""" (test_reflections, test_experiments, params) = ( small_reflection_table, single_exp, physical_param, ) assert len(test_experiments) == 1 assert len(test_reflections) == 1 experiments = create_scaling_model(params, test_experiments, test_reflections) scaler = create_scaler(params, experiments, test_reflections) assert scaler.experiment.scaling_model.id_ == "physical" # Initialise the parameters and create an apm scaler.components["scale"].inverse_scales = flex.double([2.0, 1.0, 2.0]) scaler.components["decay"].inverse_scales = flex.double([1.0, 1.0, 0.4]) apm = multi_active_parameter_manager([scaler.components], [["scale", "decay"]], scaling_active_parameter_manager) # Now do finite difference check. target = ScalingTarget() scaler.update_for_minimisation(apm, 0) grad = target.calculate_gradients(scaler.Ih_table.blocked_data_list[0]) res = target.calculate_residuals(scaler.Ih_table.blocked_data_list[0]) assert (res > 1e-8), """residual should not be zero, or the gradient test below will not really be working!""" # Now compare to finite difference f_d_grad = calculate_gradient_fd(target, scaler, apm) print(list(f_d_grad)) print(list(grad)) assert approx_equal(list(grad), list(f_d_grad)) sel = f_d_grad > 1e-8 assert sel, """assert sel has some elements, as finite difference grad should