Matplotlib.axes.Axes.invert_yaxis() in Python

Matplotlib.axes.Axes.yaxis_inverted() in Python

Last Updated : 19 Apr, 2020

Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. The Axes Class contains most of the figure elements: Axis, Tick, Line2D, Text, Polygon, etc., and sets the coordinate system. And the instances of Axes supports callbacks through a callbacks attribute.

matplotlib.axes.Axes.yaxis_inverted() Function

The Axes.yaxis_inverted() function in axes module of matplotlib library return whether the y-axis is inverted or not.

Syntax: Axes.yaxis_inverted(self)

Parameters: This method does not accepts any parameters.

Returns:This method return whether the y-axis is inverted or not.

Below examples illustrate the matplotlib.axes.Axes.yaxis_inverted() function in matplotlib.axes:

Example 1:

# Implementation of matplotlib function 
import matplotlib.pyplot as plt 
import numpy as np 
   
fig, ax = plt.subplots() 
   
ax.axvspan(1.5, 2.5, facecolor ='g', alpha = 0.7) 
ax.invert_yaxis() 
  
ax.set_title('matplotlib.axes.Axes.yaxis_inverted() \ 
Example\n', 
             fontsize = 14, fontweight ='bold') 
x = ax.yaxis_inverted() 
ans ="No"
if x: 
    ans ="Yes"
ax.text(1.8, -0.02, "Y-axis is inverted ? : " + ans, 
        style ='italic', fontsize = 12) 
  
plt.show() 

Output:

Example 2:

# Implementation of matplotlib function 
import matplotlib.pyplot as plt 
import numpy as np 
   
np.random.seed(19680801) 
plt.rcdefaults() 
fig, ax = plt.subplots() 
  
people = ('Geek1', 'Geek2', 'Geek3', 
          'Geek4', 'Geek5') 
  
y_pos = np.arange(len(people)) 
performance = 3 + 4.5 * np.random.rand(len(people))**2
error = np.random.rand(len(people)) 
  
ax.barh(y_pos, performance, xerr = error, 
        align ='center', color ="green") 
ax.set_yticks(y_pos) 
ax.set_yticklabels(people) 
  
ax.invert_yaxis()   
ax.set_xlabel('Performance') 
x = ax.yaxis_inverted() 
ans ="No"
if x: 
    ans ="Yes"
      
ax.set_title('matplotlib.axes.Axes.yaxis_inverted() \ 
Example\n', 
             fontsize = 14, fontweight ='bold') 
ax.text(3, -0.75, "Y-axis is inverted ? : " + ans,  
        style ='italic', fontsize = 12) 
  
plt.show() 

Output:

Matplotlib.axes.Axes.invert_yaxis() in Python

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