How to plot a line (polygonal chain) with matplotlib with minimal smoothing?

To plot a line (polygonal chain) with matplotlib with minimal smoothing, we can take the following steps −

Set the figure size and adjust the padding between and around the subplots.
Initalize a variable, N, to get the number of data points.
Create x and y data points using numpy.
Get 1-D monotonic cubic interpolation, using pchip() method.
Plot (x, interp(x)) and (x, y) data points using numpy.
To display the figure, use show() method.

Example

import numpy as np
from scipy.interpolate import pchip
import matplotlib.pyplot as plt

plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True

N = 50
x = np.linspace(-10, 10, N)
y = np.sin(x)
interp = pchip(x, y)

plt.plot(x, interp(x), color='red')
plt.plot(x, y, 'bo')

plt.show()

Output

Rishikesh Kumar Rishi

Updated on: 03-Aug-2021

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