Matplotlib是Python中的一个库,它是数字的-NumPy库的数学扩展。轴类包含大多数图形元素:Axis,Tick,Line2D,Text,Polygon等,并设置坐标系。 Axes实例通过callbacks属性支持回调。
matplotlib.axes.Axes.get_legend()函数
matplotlib库的axiss模块中的Axes.get_legend()函数用于返回图例实例;如果未定义图例,则返回None。
用法: Axes.get_legend(self)
参数:此方法不接受任何参数。
返回:此函数返回图例实例,如果未定义图例,则返回None。
以下示例说明了matplotlib.axes中的matplotlib.axes.Axes.get_legend()函数:
范例1:
# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
fig, ax = plt.subplots()
ax.plot([1, 6, 3, 8, 34, 13, 56, 67], color ="green")
x = ax.get_legend()
text ="Legend is present"
if x == None:
text ="No legend present"
ax.text(2.5, 60, text, fontweight ="bold")
fig.suptitle('matplotlib.axes.Axes.get_legend() function\
Example\n', fontweight ="bold")
fig.canvas.draw()
plt.show()
输出:
范例2:
# Implementation of matplotlib function
import matplotlib.pyplot as plt
fig, (ax, ax1) = plt.subplots(1, 2)
# axes1
line1, = ax.plot([1, 2, 3], label ="Line 1",
color ="black", linewidth = 4,
linestyle =':')
line2, = ax.plot([3, 2, 1], label ="Line 2",
color ="green",
linewidth = 4)
first_legend = ax.legend(handles =[line1],
loc ='upper center')
ax.add_artist(first_legend)
ax.legend(handles =[line2], loc ='lower center')
ax.set_title("Without get_legend function")
# axes1
line1, = ax1.plot([1, 2, 3], label ="Line 1",
color ="black", linewidth = 4,
linestyle =':')
line2, = ax1.plot([3, 2, 1], label ="Line 2",
color ="green",
linewidth = 4)
first_legend = ax1.legend(handles =[line1],
loc ='upper center')
ax1.add_artist(first_legend)
ax1.legend(handles =[line2],
loc ='lower center')
ax1.get_legend().set_visible(False)
ax1.set_title("Using get_legend function")
fig.suptitle('matplotlib.axes.Axes.get_legend()\
function Example\n', fontweight ="bold")
plt.show()
输出:
相关用法
注:本文由纯净天空筛选整理自SHUBHAMSINGH10大神的英文原创作品 Matplotlib.axes.Axes.get_legend() in Python。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。