# 如何在 Matplotlib 中删除图例

Suraj Joshi 2023年1月30日 2020年6月9日

## `matplotlib.axes.Axes.get_legend().remove()`

``````import numpy as np
import matplotlib.pyplot as plt

x=np.linspace(-3,3,100)
y1=np.exp(x)
y2=3*x+2

fig, ax = plt.subplots(figsize=(8,6))

ax.plot(x, y1, c='r', label='expoential')
ax.plot(x, y2, c='g', label='Straight line')

leg = plt.legend()

ax.get_legend().remove()

plt.show()
``````

## `matplotlib.axes.Axes.get_legend().set_visible()`

``````import numpy as np
import matplotlib.pyplot as plt

x=np.linspace(-3,3,100)
y1=np.exp(x)
y2=3*x+2

fig, ax = plt.subplots(figsize=(8,6))

ax.plot(x, y1, c='r', label='expoential')
ax.plot(x, y2, c='g', label='Straight line')

leg = plt.legend()

ax.get_legend().set_visible(False)

plt.show()
``````

## `matplotlib.axes.Axes.plot()` 方法中的 `label=_nolegend_` 参数

``````import numpy as np
import matplotlib.pyplot as plt

x=np.linspace(-3,3,100)
y1=np.exp(x)
y2=3*x+2

fig, ax = plt.subplots(figsize=(8,6))
leg = plt.legend()

ax.plot(x, y1, c='r', label='_nolegend_')
ax.plot(x, y2, c='g', label='_nolegend_')

plt.show()
``````

## 将 `axis` 对象的 `legend_` 属性设置为 None

`axis` 对象的 `legend_` 属性设置为 `None` 可以从 Matplotlib 中的图形中删除图例。

``````import numpy as np
import matplotlib.pyplot as plt

x=np.linspace(-3,3,100)
y1=np.exp(x)
y2=3*x+2

fig, ax = plt.subplots(figsize=(8,6))
leg = plt.legend()

ax.plot(x, y1, c='r', label='expoential')
ax.plot(x, y2, c='g', label='Straight line')

plt.gca.legend_ =None

plt.show()
``````

Author: Suraj Joshi

Suraj Joshi is a backend software engineer at Matrice.ai.