Add default `rcParams`

[iaraota]

This pull request introduces default rcParams, ensuring that plots have the desired appearance without the necessity of activating the ligo-summary-3.10 Conda environment.

These parameters were obtained by comparing the matplotlib.rcParams differences between igwn and ligo-summary-3.10 Conda environments.

[iaraota]

@eagoetz I tested the following:

import matplotlib.pyplot as plt
import numpy as np
import matplotlib as mpl

plt.rcParams["figure.figsize"] = (5,10)
data = np.random.randn(50)
plt.plot(data)
plt.savefig('before_gwsumm.png')
import gwsumm
plt.close('all')
plt.plot(data)
plt.savefig('before_after.png')

The saved figures remain unchanged, that is, the "figure.figsize" stays at (5,10) rather than the GWSumm default of (12, 6).

[eagoetz]

@iaraota Thanks for trying this out! Have you tried from gwsumm import plot? I want to confirm what that does with this PR. Thanks!

Also, I'm not sure what's going on with the CI failures, but it is likely related to this change.

[codecov[bot]]

Codecov Report

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Comparison is base (a50504f) 50.17% compared to head (09601f5) 49.96%. Report is 4 commits behind head on master.

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[iaraota]

@eagoetz thank you for your suggestion. I tested the following, and the plots remain the same:

import matplotlib.pyplot as plt
import numpy as np
import matplotlib as mpl

plt.rcParams["figure.figsize"] = (5,10)
data = np.random.randn(50)
plt.plot(data)
plt.savefig('before_gwsumm.png')
from gwsumm import plot
plot.DataPlot(['L1:DMT-SNSL_EFFECTIVE_RANGE_MPC'], 1388102418, 1388188818)
plt.close('all')
plt.plot(data)
plt.savefig('before_after.png')

I fixed the test. It was checking whether cp.set('plot', 'figure.figsize', '2, 1') works. However, since rcParams used to be empty, is was asserting the rcParams as a dictionary. Now I am testing only the change in figure.figsize. By the way, this test also shows that rcParams is changeable, as you were concerned it could not be.