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Python Matplotlib.axes.Axes.get_legend()用法及代碼示例

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:




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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。