Quiver Diagram in Matplotlib

Quiver Diagram in Matplotlib

This Tutorial teaches you how to make quiver diagrams with Matplotlib.

Create Quiver Diagram With Matplotlib

We need to supply the matplotlib.pyplot.quiver function with four arguments to make the diagram. The X, Y-axis, and the X, Y vector direction.

The x coordinate is the first item of the coordinates array, and the second item is the Y coordinate, respectively. It’s the same for the next array, which represents the vector.

Code:

import matplotlib.pyplot as plt

coordinates = [0, 0]
vector = [1, 2]

plt.quiver(coordinates[0], coordinates[1], vector[0], vector[1])

Output:

Create Quiver Diagram With Matplotlib

We can also make multiple arrows that point in different directions. Remember that the arrays all need to have the same amount of items or length.

Code:

import matplotlib.pyplot as plt
from random import randrange

x = [x for x in range(10)]
y = [y for y in range(10)]
vec_x = [randrange(-2, 2) for x in range(10)]
vec_y = [randrange(-2, 2) for x in range(10)]

plt.quiver(x, y, vec_x, vec_y)

Output:

make multiple arrows that point in different directions

Complete Code:

import matplotlib.pyplot as plt
from random import randrange

x = [x for x in range(10)]
y = [y for y in range(10)]
vec_x = [randrange(-2, 2) for x in range(10)]
vec_y = [randrange(-2, 2) for x in range(10)]

plt.quiver(x, y, vec_x, vec_y)
Author: Maxim Maeder
Maxim Maeder avatar Maxim Maeder avatar

Hi, my name is Maxim Maeder, I am a young programming enthusiast looking to have fun coding and teaching you some things about programming.

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