def test_plot_bar_and_class_map(pytestconfig):
m = class_map(30, 10, 20, 8)
fig, ax = plt.subplots(1, 2)
data = init_class_data(m,
ax=ax[0],
colorbar_settings={
'ax': ax,
'location': 'bottom'
})
plot_class_map(data=data, ax=ax[0])
bar(data=data, ax=ax[1])
def test_no_args():
# Custom errors as not required if data keyword argument given.
with pytest.raises(TypeError) as e:
bar()
assert "bar() missing 1 required positional argument: 'class_map'" == str(
e.value)
with pytest.raises(TypeError) as e:
plot_class_map()
assert "plot_class_map() missing 1 required positional argument: 'class_map'" == str(
e.value)
#%% # Now that we have a trained neural network, # we can use it to classify spectra. # Usually spectra will be classified automatically # during the fitting process, however, you # can request the classification by themselves, classifications = model.classify_spectra(row=range(60), column=range(50)) #%% # These classifications look as follows, from mcalf.visualisation import plot_class_map plot_class_map(classifications) #%% # Creating a reproducible classifier # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # The neural network classifier introduces a certain amount # of randomness when it it fitting based on the training # data. This randomness arises in the initial values # of the weights and biases that are fitted during the # training process, as well as the order in which the # training data are used. # # This means that two neural networks trained on identical # data will not produce the same results. To aid the # reproducibility of results that rely on a neural
# new axes.
# The colorbar axes can be set to ``fig.axes`` such that
# the colorbar takes the full height of the figure, as
# in this case, its colours are the same as the line plots.
import matplotlib.pyplot as plt
from mcalf.visualisation import plot_classifications, plot_class_map
fig = plt.figure(constrained_layout=True)
gs = plot_classifications(spectra, labels, nrows=2, show_labels=False)
ax = fig.add_subplot(gs[-1])
plot_class_map(class_map,
ax=ax,
colorbar_settings={
'ax': fig.axes,
'label': 'classification',
})
#%%
# The function :func:`mcalf.visualisation.init_class_data`` is
# intended to be an internal function for generating data that
# is common to multiple plotting functions. However, it may be
# used externally if necessary.
from mcalf.visualisation import init_class_data, bar
fig, ax = plt.subplots(1, 2, constrained_layout=True)
data = init_class_data(class_map, resolution=(0.25, 0.25), ax=ax[1])
n = 5 # Possible classifications [0, 1, 2, 3, 4]
class_map = c(t, x, y, n) # 3D array of classifications (t, y, x)
#%%
# Next, we shall import :func:`mcalf.visualisation.plot_class_map`.
from mcalf.visualisation import plot_class_map
#%%
# We can now simply plot the 3D array.
# By default, the first dimension of a 3D array will be averaged to
# produce a time average, selecting the most common classification
# at each (x, y) coordinate.
plot_class_map(class_map)
#%%
# A spatial resolution with units can be specified for each axis.
import astropy.units as u
plot_class_map(class_map, resolution=(0.75 * u.km, 1.75 * u.Mm),
offset=(-25, -10),
dimension=('x distance', 'y distance'))
#%%
# A narrower range of classifications to be plotted can be
# requested with the ``vmin`` and ``vmax`` parameters.
# Classifications outside of the range will appear as grey,
# the same as pixels with a negative, unassigned classification.
def test_plot_class_map_allbad(pytestconfig):
m = class_map(30, 10, 20, 8)
m[:] = -1
plot_class_map(m)
def test_plot_class_map_units(pytestconfig):
m = class_map(30, 10, 20, 8)
plot_class_map(m,
resolution=(2.5 * u.m, 3.5 * u.km),
offset=(5, 10),
dimension=('dim x', 'dim y'))
def test_plot_class_map_range(pytestconfig):
m = class_map(30, 10, 20, 8)
plot_class_map(m, vmin=2, vmax=4)
def test_plot_class_map_nocolorbar(pytestconfig):
m = class_map(30, 10, 20, 8)
plot_class_map(m, show_colorbar=False)
def test_plot_class_map(pytestconfig):
m = class_map(30, 10, 20, 8)
plot_class_map(m)
#%% # This function plots the spectra grouped # by classification, from mcalf.visualisation import plot_classifications plot_classifications(spectra_1d, classifications.flatten()) #%% # This function plots a spatial map of # the classifications on the 2x3 grid, from mcalf.visualisation import plot_class_map plot_class_map(classifications) #%% # Merge output data # ~~~~~~~~~~~~~~~~~ # # The :class:`~mcalf.models.FitResult` objects in the # ``fits`` 1D list can be merged into a grid. # Each of these objects can be appended to a # single :class:`~mcalf.models.FitResults` object. # This allows for increased data portability, from mcalf.models import FitResults # Initialise with the grid shape and num. params. results = FitResults((2, 3), 8)
