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Placing text boxes

When decorating axes with text boxes, two useful tricks are to place the text in axes coordinates (see Transformations Tutorial), so the text doesn’t move around with changes in x or y limits. You can also use the bbox property of text to surround the text with a Patch instance – the bbox keyword argument takes a dictionary with keys that are Patch properties.

../../_images/sphx_glr_placing_text_boxes_001.png
import numpy as np
import matplotlib.pyplot as plt

np.random.seed(1234)

fig, ax = plt.subplots()
x = 30*np.random.randn(10000)
mu = x.mean()
median = np.median(x)
sigma = x.std()
textstr = '$\mu=%.2f$\n$\mathrm{median}=%.2f$\n$\sigma=%.2f$' % (mu, median, sigma)

ax.hist(x, 50)
# these are matplotlib.patch.Patch properties
props = dict(boxstyle='round', facecolor='wheat', alpha=0.5)

# place a text box in upper left in axes coords
ax.text(0.05, 0.95, textstr, transform=ax.transAxes, fontsize=14,
        verticalalignment='top', bbox=props)

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