How do `fig` and `axes` Work in Matplotlib's `subplots()` Function?-Python Tutorial-php.cn

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How do `fig` and `axes` Work in Matplotlib's `subplots()` Function?

Patricia Arquette

Dec 24, 2024 am 02:35 AM

How do `fig` and `axes` Work in Matplotlib's `subplots()` Function?

Plotting in Multiple Subplots

Question:

In the following code, how do the fig and axes variables work when using subplots():

fig, axes = plt.subplots(nrows=2, ncols=2)
plt.show()

Answer:

The subplots() method creates a figure (fig) and an array (axes) of subplot axes. Each subplot axis corresponds to a cell in the specified grid of subplots. In this case, the grid has 2 rows and 2 columns, resulting in 4 subplot axes stored in the axes array.

Reason for the Subplots Array:

subplots() is designed to simplify plotting in multiple subplots. Rather than creating separate figures and axes for each subplot manually, you can use subplots() to create a single figure containing multiple subplots. The axes array allows you to access and plot on each subplot axis individually.

Comparison with Alternative Approach:

The alternative approach mentioned in the question creates a figure (fig) and then calls fig.subplots() to create the subplots:

fig = plt.figure()
axes = fig.subplots(nrows=2, ncols=2)

This approach is valid but less efficient than using subplots() directly because it requires two separate calls. Moreover, it is not necessary to assign the figure to a variable (fig) when using subplots() directly.

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