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Matplotlib.axes.Axes.stem() in Python

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  • Last Updated : 13 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.stem() Function

The Axes.stem() function in axes module of matplotlib library is used to create a stem plot.

Syntax: Axes.stem(self, *args, linefmt=None, markerfmt=None, basefmt=None, bottom=0, label=None, use_line_collection=False, data=None)

Parameters: This method accept the following parameters that are described below:

  • x: This parameter is the sequence of x coordinates of the stems.
  • y: This parameter is the sequence of y coordinates of the stem heads.
  • linefmt: This parameter is the string defining the properties of the vertical lines.
  • markerfmt: This parameter is the string defining the properties of the markers at the stem heads.
  • basefmt: This parameter is the string defining the properties of the baseline.
  • bottom: This parameter is the y-position of the baseline.
  • label: This parameter is the label to use for the stems in legends.

Returns: This returns the following:

  • StemContainer: This returns the container which may be treated like a tuple (markerline, stemlines, baseline).

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

Example-1:




# Implementation of matplotlib function
import matplotlib.pyplot as plt
  
fig, ax = plt.subplots()
  
ax.stem([0.3, 1.5, 2.7], 
        [1, 3.6, 2.7], 
        label ="stem test")
  
ax.legend()
ax.set_title('matplotlib.axes.Axes.stem Example')
plt.show()

Output:

Example-2:




# Implementation of matplotlib function
import matplotlib.pyplot as plt
import numpy as np
  
x = np.linspace(0.1, 2 * np.pi, 41)
y = np.exp(np.sin(x))
  
fig, ax = plt.subplots()
  
ax.stem(x, y, linefmt ='grey'
        markerfmt ='D'
        bottom = 1.1
        use_line_collection = True)
  
ax.set_title('matplotlib.axes.Axes.stem Example')
plt.show()


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