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Original file line number | Diff line number | Diff line change |
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# -*- coding: utf-8 -*- | ||
# Copyright 2007-2018 The HyperSpy developers | ||
# | ||
# This file is part of HyperSpy. | ||
# | ||
# HyperSpy is free software: you can redistribute it and/or modify | ||
# it under the terms of the GNU General Public License as published by | ||
# the Free Software Foundation, either version 3 of the License, or | ||
# (at your option) any later version. | ||
# | ||
# HyperSpy is distributed in the hope that it will be useful, | ||
# but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
# GNU General Public License for more details. | ||
# | ||
# You should have received a copy of the GNU General Public License | ||
# along with HyperSpy. If not, see <http://www.gnu.org/licenses/>. | ||
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import os | ||
import numpy as np | ||
import pytest | ||
import numpy.testing as nt | ||
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import hyperspy.api as hs | ||
from hyperspy.signals import Signal1D, EELSSpectrum | ||
from hyperspy.components1d import Gaussian | ||
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my_path = os.path.dirname(__file__) | ||
baseline_dir = 'plot_model' | ||
default_tol = 2.0 | ||
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def create_ll_signal(signal_shape=1000): | ||
offset = 0 | ||
zlp_param = {'A': 10000.0, 'centre': 0.0 + offset, 'sigma': 15.0} | ||
zlp = Gaussian(**zlp_param) | ||
plasmon_param = {'A': 2000.0, 'centre': 200.0 + offset, 'sigma': 75.0} | ||
plasmon = Gaussian(**plasmon_param) | ||
axis = np.arange(signal_shape) | ||
data = zlp.function(axis) + plasmon.function(axis) | ||
ll = EELSSpectrum(data) | ||
ll.axes_manager[-1].offset = -offset | ||
ll.axes_manager[-1].scale = 0.1 | ||
return ll | ||
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A_value_gaussian = [1000.0, 600.0, 2000.0] | ||
centre_value_gaussian = [50.0, 20.0, 60.0] | ||
sigma_value_gaussian = [5.0, 3.0, 1.0] | ||
scale = 0.1 | ||
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def create_sum_of_gaussians(convolved=False): | ||
param1 = {'A': A_value_gaussian[0], | ||
'centre': centre_value_gaussian[0]/scale, | ||
'sigma': sigma_value_gaussian[0]/scale} | ||
gs1 = Gaussian(**param1) | ||
param2 = {'A': A_value_gaussian[1], | ||
'centre': centre_value_gaussian[1]/scale, | ||
'sigma': sigma_value_gaussian[1]/scale} | ||
gs2 = Gaussian(**param2) | ||
param3 = {'A': A_value_gaussian[2], | ||
'centre': centre_value_gaussian[2]/scale, | ||
'sigma': sigma_value_gaussian[2]/scale} | ||
gs3 = Gaussian(**param3) | ||
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axis = np.arange(1000) | ||
data = gs1.function(axis) + gs2.function(axis) + gs3.function(axis) | ||
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if convolved: | ||
to_convolved = create_ll_signal(data.shape[0]).data | ||
data = np.convolve(data, to_convolved) / sum(to_convolved) | ||
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s = Signal1D(data[:1000]) | ||
s.axes_manager[-1].scale = scale | ||
return s | ||
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def _generate_parameters(): | ||
parameters = [] | ||
for convolved in [True, False]: | ||
for plot_component in [True, False]: | ||
for binned in [True, False]: | ||
parameters.append([convolved, plot_component, binned]) | ||
return parameters | ||
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@pytest.mark.parametrize(("convolved", "plot_component", "binned"), | ||
_generate_parameters()) | ||
@pytest.mark.mpl_image_compare( | ||
baseline_dir=baseline_dir, tolerance=default_tol) | ||
def test_plot_gaussian_eelsmodel(convolved, plot_component, binned): | ||
s = create_sum_of_gaussians(convolved) | ||
s.set_signal_type('EELS') | ||
s.metadata.General.title = 'Convolved: {}, plot_component: {}, binned: {}'.format( | ||
convolved, plot_component, binned) | ||
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ll = create_ll_signal(1000) if convolved else None | ||
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s.set_microscope_parameters(200, 20, 50) | ||
s.metadata.Signal.binned = binned | ||
m = s.create_model(auto_background=False, ll=ll) | ||
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m.extend([Gaussian(), Gaussian(), Gaussian()]) | ||
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def set_gaussian(gaussian, centre, sigma): | ||
gaussian.centre.value = centre | ||
gaussian.centre.free = False | ||
gaussian.sigma.value = sigma | ||
gaussian.sigma.free = False | ||
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for gaussian, centre, sigma in zip(m, centre_value_gaussian, | ||
sigma_value_gaussian): | ||
set_gaussian(gaussian, centre, sigma) | ||
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m.fit() | ||
m.plot(plot_components=plot_component) | ||
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def A_value(s, component, binned): | ||
if binned: | ||
return component.A.value * scale | ||
else: | ||
return component.A.value | ||
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if convolved: | ||
nt.assert_almost_equal(A_value(s, m[0], binned), 0.014034, decimal=5) | ||
nt.assert_almost_equal(A_value(s, m[1], binned), 0.008420, decimal=5) | ||
nt.assert_almost_equal(A_value(s, m[2], binned), 0.028068, decimal=5) | ||
else: | ||
nt.assert_almost_equal(A_value(s, m[0], binned), 100.0) | ||
nt.assert_almost_equal(A_value(s, m[1], binned), 60.0) | ||
nt.assert_almost_equal(A_value(s, m[2], binned), 200.0) | ||
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return m._plot.signal_plot.figure | ||
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@pytest.mark.parametrize(("convolved"), [False, True]) | ||
@pytest.mark.mpl_image_compare( | ||
baseline_dir=baseline_dir, tolerance=default_tol) | ||
def test_fit_EELS_convolved(convolved): | ||
dname = os.path.join(my_path, 'data') | ||
cl = hs.load(os.path.join(dname, 'Cr_L_cl.hspy')) | ||
cl.metadata.Signal.binned = False | ||
cl.metadata.General.title = 'Convolved: {}'.format(convolved) | ||
ll = hs.load(os.path.join(dname, 'Cr_L_ll.hspy')) if convolved else None | ||
m = cl.create_model(auto_background=False, ll=ll, GOS='hydrogenic') | ||
m.fit(kind='smart') | ||
m.plot(plot_components=True) | ||
return m._plot.signal_plot.figure |
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