Can't I change the position of the chart description?

I'm making a graph with about 20 dots It's annoying because the legend keeps coming into the graph.

On a line that does not change the size of the axis or graph, I want to put the legend outside the graph (right) and reduce the font size in the legend.

Where is the function that changes the font size and the position of the legend?

python matplotlib legend

2022-09-22 22:24

1 Answers

There are many ways, but as far as I know, Use the bbox_to_anchor keyword to leave legend outside the graph or to change font size.

First, if you write how to move the position of the legend,

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(10)

fig = plt.figure()
ax = plt.subplot(111)

for i in xrange(5):
    ax.plot(x, i * x, label='$y = %ix$' % i)

ax.legend()

plt.show()

alt text If the legend blocks the graph, You can change the position of the legend by using bbox_to_anchor.

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(10)

fig = plt.figure()
ax = plt.subplot(111)

for i in xrange(5):
    ax.plot(x, i * x, label='$y = %ix$' % i)

ax.legend(bbox_to_anchor=(1.1, 1.05))

plt.show()

alt text

It's not perfect, but the legend moved in the direction of one o'clock. Similarly, the method of horizontally aligning the legend and placing it at the top of the graph is as follows. * Additionally, the legend box is rounded and shaded

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(10)

fig = plt.figure()
ax = plt.subplot(111)

for i in xrange(5):
    line, = ax.plot(x, i * x, label='$y = %ix$'%i)

ax.legend(loc='upper center', bbox_to_anchor=(0.5, 1.05),
          ncol=3, fancybox=True, shadow=True)
plt.show()

alt text

Control the size of the

graph and possible to completely outside the legend.

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(10)

fig = plt.figure()
ax = plt.subplot(111)

for i in xrange(5):
    ax.plot(x, i * x, label='$y = %ix$'%i)

# # Shrink current axis by 20%
box = ax.get_position()
ax.set_position([box.x0, box.y0, box.width * 0.8, box.height])

# # Put a legend to the right of the current axis
ax.legend(loc='center left', bbox_to_anchor=(1, 0.5))

plt.show()

alt text

Similar to horizontal, you can also shorten the legend box vertically and place the legend under the graph

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(10)

fig = plt.figure()
ax = plt.subplot(111)

for i in xrange(5):
    line, = ax.plot(x, i * x, label='$y = %ix$'%i)

# # Shrink current axis's height by 10% on the bottom
box = ax.get_position()
ax.set_position([box.x0, box.y0 + box.height * 0.1,
                 box.width, box.height * 0.9])

# # Put a legend below current axis
ax.legend(loc='upper center', bbox_to_anchor=(0.5, -0.05),
          fancybox=True, shadow=True, ncol=5)

plt.show()

alt text

For more information, refer to matplotliblegend guide

2022-09-22 22:24

If you have any answers or tips

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