Matplotlib - Markers

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In Matplotlib markers are used to highlight individual data points on a plot. The marker parameter in the plot() function is used to specify the marker style. The following is the syntax for using markers in Matplotlib.

Syntax

The following is the syntax and parameters of using the markers in matplotlib library.

plt.plot(x, y, marker='marker_style')

Where,

• x and y − Arrays or sequences of values representing the data points to be plotted.

• marker − Specifies the marker style to be used. It can be a string or one of the following marker styles:

Scatterplot with pentagonal marker

Here in this example we are creating the scatterplot with the pentagonal marker by using the scatter() function of the pyplot module.

Example

import matplotlib.pyplot as plt
# Data
x = [22,1,7,2,21,11,14,5]
y = [24,2,12,5,5,5,9,12]
plt.scatter(x,y, marker = 'p')

# Customize the plot (optional)
plt.xlabel('X-axis')
plt.ylabel('Y-axis')
plt.title(' Scatter Plot with pentagonal marker')

# Display the plot
plt.show()

Output

Line plot with triangular marker

In this example we are creating a line plot with the triangle marker by providing marker values as 'v' to the plot() function of the pyplot module.

Example

import matplotlib.pyplot as plt
# Data
x = [22,1,7,2,21,11,14,5]
y = [24,2,12,5,5,5,9,12]
plt.plot(x,y, marker = 'v')

# Customize the plot (optional)
plt.xlabel('X-axis')
plt.ylabel('Y-axis')
plt.title(' Line Plot with triangular marker')

# Display the plot
plt.show()

Output