Matplotlib是Python中的一個庫,它是數字的-NumPy庫的數學擴展。軸類包含大多數圖形元素:Axis,Tick,Line2D,Text,Polygon等,並設置坐標係。 Axes實例通過callbacks屬性支持回調。
matplotlib.axes.Axes.get_legend()函數
matplotlib庫的axiss模塊中的Axes.get_legend()函數用於返回圖例實例;如果未定義圖例,則返回None。
用法: Axes.get_legend(self)
參數:此方法不接受任何參數。
返回:此函數返回圖例實例,如果未定義圖例,則返回None。
以下示例說明了matplotlib.axes中的matplotlib.axes.Axes.get_legend()函數:
範例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()
輸出:
範例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()
輸出:
相關用法
注:本文由純淨天空篩選整理自SHUBHAMSINGH10大神的英文原創作品 Matplotlib.axes.Axes.get_legend() in Python。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。