How to Connect Scatterplot Points With Line in Matplotlib?

Prerequisite: Scatterplot using Seaborn in Python

Scatterplot can be used with several semantic groupings which can help to understand well in a graph. They can plot two-dimensional graphics that can be enhanced by mapping up to three additional variables while using the semantics of hue, size, and style parameters. And matplotlib is very efficient for making 2D plots from data in arrays. In this article, we are going to see how to connect scatter plot points with lines in matplotlib.

Approach:

• Import module.
• Determined X and Y coordinate for plot scatter plot points.
• Plot scatterplot.
• Plot matplotlib.pyplot with the same X and Y coordinate.

Below is the implementation:

Example 1:

Python3

# import module
import numpy as np
import matplotlib.pyplot as plt

# initialize x and y coordinates
x = [0.1, 0.2, 0.3, 0.4, 0.5]
y = [6.2, -8.4, 8.5, 9.2, -6.3]

# set the title of a plot
plt.title("Connected Scatterplot points with lines")

# plot scatter plot with x and y data
plt.scatter(x, y)

# plot with x and y data
plt.plot(x, y)

Output:

Example 2:

Python3

# import module
import numpy as np
import matplotlib.pyplot as plt

# initialize x and y coordinates
x = [1, 2, 3]
y = [1, 2, 3]

# set the title of a plot
plt.title("Connected Scatterplot points with lines")

# plotting scatter and pyplot
plt.scatter(x, y)
plt.plot(x, y)

Output:

Example 3: 

We can also connect scatter plot points with lines without using seaborn.scatterplot. We will use only pyplot to connect the scatter points with lines.

Python3

# import module
import numpy as np
import matplotlib.pyplot as plt

# initialize x and y coordinates
x = [0.1, 0.2, 0.3, 0.4, 0.5]
y = [6.2, -8.4, 8.5, 9.2, -6.3]

plt.title("Connected Scatterplot points with line")
plt.plot(x, y, marker="*")
plt.show()

Output: