Matplotlib.pyplot.axvspan() in Python (original) (raw)

Last Updated : 12 Apr, 2020

Matplotlib is a plotting library for creating static, animated, and interactive visualizations in Python.\ Pyplot is a Matplotlib module which provides a MATLAB-like interface. Matplotlib is designed to be as usable as MATLAB, with the ability to use Python and the advantage of being free and open-source.

matplotlib.pyplot.axvspan()

This function sets the vertical rectangle across the axes of the plot

Syntax: matplotlib.pyplot.axvspan(xmin, xmax, ymin=0, ymax=1, **kwargs)

Parameters:
**xmin :**Number indicating the starting position of the vertical rectangle on X-axis
**xmin :**Number indicating the ending position of the vertical rectangle on X-axis
**ymin :**vertical rectangle starting position on y axis, it will take values between 0 and 1, 0 being bottom of the axis, 1 being top of the axis
**ymax :**vertical rectangle ending position on y axis, it will take values between 0 and 1, 0 being bottom of the axis, 1 being top of the axis
****kwargs :**Other optional parameters to change the properties of the rectangle, like changing color etc.

Example #1:

import matplotlib.pyplot as plt

x = [ 1 , 15 , 27 , 48 , 50 ]

y = [ 1 , 12 , 22 , 45 , 67 ]

plt.plot(x, y)

plt.axvspan( 5 , 20 , ymin = 0.5 , ymax = 1 )

plt.show()

Output:

Example #2:

import matplotlib.pyplot as plt

x = [ 1 , 15 , 27 , 48 , 50 ]

y = [ 1 , 12 , 22 , 45 , 67 ]

plt.plot(x, y)

plt.axvspan( 5 , 15 , ymin = 0.25 ,

`` ymax = 0.80 , ec = 'blue' ,

`` color = 'yellow' )

plt.show()

Output :

Example #3:

import matplotlib.pyplot as plt

x = [ 1 , 15 , 27 , 48 , 50 ]

y = [ 1 , 12 , 22 , 45 , 67 ]

plt.plot(x, y)

plt.axvspan( 10 , 30 , ymin = 0.15 ,

`` ymax = 0.70 , ec = 'blue' ,

`` color = 'yellow' ,

`` alpha = 0.5 )

plt.show()

Output :