What is the Argument in plt.figure.add_subplot()?

Understanding the Argument in plt.figure.add_subplot()

In the context of Matplotlib, the fig.add_subplot() method is used to create subplots within a figure window. The argument passed to this method helps determine the position and arrangement of these subplots.

The Argument

The argument in fig.add_subplot() is typically a three-digit number, such as 111 or 212. This number represents the position of the subplot within the grid of subplots.

Visualizing the Grid

Imagine a grid of subplots with rows (indicated by the first digit) and columns (indicated by the second and third digits). Each subplot is numbered sequentially, starting from the top-left corner.

    | 111 | 112 | 113 | ... |
    | ... | ... | ... | ... |
    | 211 | 212 | 213 | ... |
    | ... | ... | ... | ... |
    | ... | ... | ... | ... |

Interpretation

For example:

• 111: Creates a single subplot in the top-left corner of the grid.
• 212: Creates a subplot in the second row, first column of the grid.
• 224: Creates a subplot in the second row, fourth column of the grid.

Example Usage

Consider the following code snippet:

import matplotlib.pyplot as plt
x = [1, 2, 3, 4, 5]
y = [1, 4, 9, 16, 25]

fig = plt.figure()
fig.add_subplot(111)  # Creates a single subplot in the top-left corner

plt.scatter(x, y)
plt.show()

This code creates a figure window with a single subplot in which a scatter plot of the data in x and y is displayed.

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