How Can I Create Matplotlib Subplots with Varied Sizes?

Figure Configuration with Varied Subplot Sizes

When creating subplots within a figure, it's often desirable to customize their sizes. Matplotlib provides two approaches to achieve this:

Using GridSpec with the colspan Argument

Initially, the user attempted to use GridSpec's colspan argument to control subplot widths. However, this approach is only suitable for adjusting the first subplot's size.

Direct Configuration with width_ratios and height_ratios

As of Matplotlib version 3.6.0, width_ratios and height_ratios can be passed directly to plt.subplots and subplot_mosaic. Using this technique:

f, (a0, a1) = plt.subplots(1, 2, width_ratios=[3, 1])

creates a figure with a subplot three times wider than the second. Similarly, the following code adjusts the height ratio of three subplots:

f, (a0, a1, a2) = plt.subplots(3, 1, height_ratios=[1, 1, 3])

Employing subplots and gridspec_kw

Another option is to use subplots with gridspec_kw, specifying the width ratio through the width_ratios parameter. This approach allows for more customization options.

For instance, the following code generates subplots with a width ratio of 3:1:

f, (a0, a1) = plt.subplots(1, 2, gridspec_kw={'width_ratios': [3, 1]})

Vertical subplots can be configured similarly by adjusting height_ratios in gridspec_kw.

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