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How to plot 2D math vectors with Matplotlib?
To plot 2D math vectors with matplotlib, we can take the following steps−
- Create vector cordinates using numpy array.
- Get x, y, u and v data points.
- Create a new figure or activate an existing figure using figure method.
- Get the current axis using gca() method.
- Set x an y limits of the axes.
- To redraw the current figure, use draw() method.
- To display the figure, use show() method.
Example
import numpy as np import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True soa = np.array([[0, 0, 3, 2], [0, 0, 4, 5], [0, 0, 9, 9]]) X, Y, U, V = zip(*soa) plt.figure() ax = plt.gca() ax.quiver(X, Y, U, V, angles='xy', scale_units='xy', scale=1, color=['red', 'green', 'yellow']) ax.set_xlim([-1, 10]) ax.set_ylim([-1, 10]) plt.draw() plt.show()
Output
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