Does anyone know how to make the linewidth of a single line change as a function of x in matplotlib? For example, how would you make a line thin for small values of x, and thick for large values of x?
Basically, you need to use a polygon instead of a line. As a quick example:
import numpy as np
import matplotlib.pyplot as plt
# Make the original line...
x = np.linspace(0, 10, 100)
y = 2 * x
thickness = 0.5 * np.abs(np.sin(x) * np.cos(x))
plt.fill_between(x, y - thickness, y + thickness, color='blue')
plt.show()
Or if you want something closer to your description:
import numpy as np
import matplotlib.pyplot as plt
# Make the original line...
x = np.linspace(0, 10, 100)
y = np.cos(x)
thickness = 0.01 * x
plt.fill_between(x, y - thickness, y + thickness, color='blue')
plt.show()
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