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How to plot a smooth line with matplotlib?
To plot a smooth line with matplotlib, we can take the following steps −
Set the figure size and adjust the padding between and around the subplots.
Create a list of data points, x and y.
Plot the x and y data points.
Create x_new and bspline data points for smooth line.
Get y_new data points. Compute the (coefficients of) interpolating B-spline.
Plot x_new and y_new data points using plot() method.
To display the figure, use show() method.
import numpy as np from matplotlib import pyplot as plt from scipy import interpolate # Set the figure size plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True # x and y data points x = np.array([1, 3, 4, 6, 7]) y = np.array([5, 1, 3, 2, 4]) # Plot the data points plt.plot(x, y) # x_new, bspline, y_new x_new = np.linspace(1, 5, 50) bspline = interpolate.make_interp_spline(x, y) y_new = bspline(x_new) # Plot the new data points plt.plot(x_new, y_new) plt.show()
It will produce the following output −
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