Matplotlib Cycler

This files shows inconsistencies when using the MatplotLib plotting functions. sysplot.get_style() offers a way to fix these issues.

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# _________________________________________________________
# Scatter and Plot have different Cyclers

import numpy as np
import matplotlib.pyplot as plt

x = np.arange(10)
y = np.sin(x)

fig, axes = plt.subplots(1, 2, figsize=(10, 5))
axes[0].plot(x, y)
axes[0].plot(x + 1, y + 1)
axes[0].scatter(x + 2, y + 2)
axes[0].scatter(x + 3, y + 3)
axes[0].set_title("Plot() and Scatter() use independent cyclers")

axes[1].stem(x, y)
axes[1].stem(x + 1, y + 1, bottom=1)
axes[1].set_title("Stem() does not use a cycler")
plt.show()


# _________________________________________________________
# Cycler does not advance with color=


fig, ax = plt.subplots(1, 1, figsize=(5, 5))
ax.plot(x, y, color="gray")
ax.plot(x + 1, y + 1)

ax.scatter(x + 2, y + 2, color="gray")
ax.scatter(
    x + 3,
    y + 3,
)
ax.set_title("Passing colors means the cycler doesn't advance")

plt.show()


# _________________________________________________________
# Sysplot makes the previos a mess


import sysplot as ssp  # # noqa: E402

ssp.apply_config()

fig, axes = plt.subplots(1, 2, figsize=(10, 5))
axes[0].plot(x, y, color="gray")
axes[0].plot(x + 1, y + 1)
axes[0].scatter(x + 2, y + 2, color="gray")
axes[0].scatter(x + 3, y + 3)
axes[0].set_title("Specifying color does advance the cycler only for Plot()")

axes[1].plot(x, y, color="gray", linestyle=":")
axes[1].plot(x + 1, y + 1)
axes[1].scatter(x + 2, y + 2, color="gray", linestyle=":")
axes[1].scatter(x + 3, y + 3)
axes[1].set_title("Specifying color and linestyle no longer advance the cycler")
plt.show()


# _________________________________________________________
# get_style() fixes everything


ssp.apply_config()

fig, ax = plt.subplots(1, 1, figsize=(5, 5))
ax.plot(x, y, **ssp.get_style(index=7))
ax.plot(x + 1, y + 1)

ax.scatter(x + 2, y + 2, **ssp.get_style(ax=ax))
ax.scatter(x + 3, y + 3, **ssp.get_style(ax=ax))
ax.set_title("get_style() fixes any inconsistencies")
plt.show()