What is the method for altering the width of the columns in a Seaborn-generated heatmap?

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The method for altering the width of the columns in a Seaborn-generated heatmap is by using the matplotlib.pyplot.subplots() method to create a new figure and set the figsize parameter with desired width and height. For example:

import seaborn as sns
import matplotlib.pyplot as plt
import numpy as np

# create a matrix
matrix = np.random.rand(5, 5)

# create heatmap
plt.subplots(figsize=(10, 5))
sns.heatmap(matrix, cmap="coolwarm")
plt.show()

In this example, the figsize parameter is set to (10,5) which will create a plot with 10 inches width and 5 inches height. Adjust the width by increasing or decreasing the first parameter value.