Spanning labels with shared axes

Demonstrate shared labels across a row of related subplots.

Why UltraPlot here?

UltraPlot can span labels across subplot groups while keeping axis limits shared. This avoids manual fig.supxlabel placement and reduces label clutter.

Key functions: ultraplot.subplots(), ultraplot.gridspec.SubplotGrid.format().

See also

• Subplots and layouts

import numpy as np

import ultraplot as uplt

rng = np.random.default_rng(21)
x = np.linspace(0, 5, 300)

layout = [[1, 2, 5], [3, 4, 5]]
fig, axs = uplt.subplots(layout)
for i, ax in enumerate(axs):
    trend = (i + 1) * 0.2
    y = np.exp(-0.4 * x) * np.sin(2 * x + i * 0.6) + trend
    y += 0.05 * rng.standard_normal(x.size)
    ax.plot(x, y, lw=2)
    ax.fill_between(x, y - 0.15, y + 0.15, alpha=0.2)
    ax.set_title(f"Condition {i + 1}")
# Share first 2 plots top left
axs[:2].format(
    xlabel="Time (days)",
)
axs[1, :2].format(xlabel="Time 2 (days)")
axs[-1].format(xlabel="Time 3 (days)")
axs.format(
    xlabel="Time (days)",
    ylabel="Normalized response",
    abc=True,
    abcloc="ul",
    suptitle="Spanning labels with shared axes",
    grid=False,
)


fig.show()