Matplotlib.pyplot.fignum_exists() in Python

0 0 1 minute read

Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. Pyplot is a state-based interface to a Matplotlib module which provides a MATLAB-like interface. There are various plots which can be used in Pyplot are Line Plot, Contour, Histogram, Scatter, 3D Plot, etc.

matplotlib.pyplot.fignum_exists() method

The fignum_exists() method in pyplot module of matplotlib library is used to get whether the figure with the given id exists.

Syntax: matplotlib.pyplot.fignum_exists(num)

Parameters:
num: This parameter is the figure number.

Returns: This method returns whether the figure with the given id exists or not.

Below examples illustrate the matplotlib.pyplot.fignum_exists() function in matplotlib.pyplot:

Example 1:

#Implementation of matplotlib function 
import matplotlib.pyplot as plt 
import numpy as np 
  
   
x = np.arange(20) / 50
y = (x + 0.1)*3
     
val1 = [True, False] * 10
val2 = [False, True] * 10
     
plt.errorbar(x, y,  
             xerr=0.1, 
             xlolims=True, 
             label='Line 1') 
  
y = (x + 0.3)*3
     
y = (x + 0.6)*4
  
plt.errorbar(x + 1.2, 
             y, 
             xerr=0.1, 
             xuplims=True,  
             label='Line 3') 
     
plt.legend() 
  
plt.text(0.5, 3.7, 
         "Figure 1 Exists ? " +
         str(plt.fignum_exists(1)) , 
         fontweight="bold") 
  
plt.title('matplotlib.pyplot.fignum_exists()function\ 
Example' ,fontweight="bold")  
  
plt.show()  

Output:

Example 2:

# Implementation of matplotlib function 
import numpy as np 
import matplotlib.pyplot as plt 
    
  
x = np.linspace(0, 10, 500) 
y = np.sin(x**2)+np.cos(x) 
    
plt.plot(x, y, label ='Line 1') 
plt.plot(x, y - 0.6, label ='Line 2') 
  
plt.text(2.5, 1.9, 
         "Figure 2 Exists ? " +
         str(plt.fignum_exists(2)),  
         fontweight ="bold") 
  
plt.title('matplotlib.pyplot.fignum_exists()function\ 
 Example', fontweight ="bold")  
  
plt.show()  