How do I dynamically share the x-axis of subplots in Matplotlib after creation?

Sharing X Axes of Subplots Dynamically

Problem: Sharing the x-axes of two subplots after they have been created.

Solution:

Sharing axes is typically done during their creation using the sharex parameter. However, in cases where subplots have already been created, it's possible to share their x-axes using ax2.sharex(ax1).

Here's a Python code example to illustrate this approach:

<code class="python">import matplotlib.pyplot as plt

t = np.arange(1000) / 100
x = np.sin(2 * np.pi * 10 * t)
y = np.cos(2 * np.pi * 10 * t)

fig = plt.figure()
ax1 = plt.subplot(211)  # Create subplot 1
ax2 = plt.subplot(212)  # Create subplot 2

# Plot data in the subplots
ax1.plot(t, x)
ax2.plot(t, y)

# Share the x-axes between the subplots
ax2.sharex(ax1)

# Disable tick labels for one of the subplots to avoid duplication
ax1.set_xticklabels([])

plt.show()</code>

In this code, after creating the subplots, we use ax2.sharex(ax1) to link the x-axes of the two subplots. To prevent duplicate tick labels, we manually disable them for ax1.

Alternatively, you can use a loop to share x-axes for a list of subplots, such as:

<code class="python">axes = [ax1, ax2, ax3]

for ax in axes[1:]:
    ax.sharex(axes[0])</code>

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