How to Interpret the Argument in Matplotlib\'s fig.add_subplot() Method?

Understanding the Argument in fig.add_subplot()

In Matplotlib, the fig.add_subplot() method is used to add a subplot to the existing figure. It takes a single argument, which is a 3-digit number.

Interpretation of the Argument

The 3-digit argument in fig.add_subplot() specifies the position of the subplot within the figure. Each digit represents a specific grid layout:

• First Digit: Number of rows in the subplot grid
• Second Digit: Number of columns in the grid
• Third Digit: Position of the subplot within the grid

Example

Let's consider the example code provided:

import matplotlib.pyplot as plt
x = [1, 2, 3, 4, 5]
y = [1, 4, 9, 16, 25]
fig = plt.figure()
fig.add_subplot(111)
plt.scatter(x, y)
plt.show()

Explanation:

In this code, the 3-digit argument in fig.add_subplot() is 111, which implies the following:

• First Digit (1): There is 1 row in the subplot grid.
• Second Digit (1): There is 1 column in the grid.
• Third Digit (1): The subplot is positioned in the 1st (and only) position in the grid.

Therefore, using 111 as the argument creates a single subplot that occupies the entire figure space.

Similarly, the argument 212 would create a subplot grid with 2 rows and 1 column, and the subplot would be positioned in the 2nd position (bottom right) of the grid.

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