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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 −

## 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.

## Example

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()

## Output

It will produce the following output −

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