[FIXED] Same length of vectors using quiver for wind direction representation

Issue

I have a code like

import matplotlib.pyplot as plt
import numpy as np
U= np.array([-2.99, -3.12, -4.18, -4.45, -3.36, -4.66, -3.93, -2.53, -4.6 ,
       -4.71, -3.64, -2.81, -2.5 , -3.35, -3.24])
V= np.array([-6.33, -6.25, -6.54, -7.48, -6.27, -6.48, -5.69, -5.81, -8.81,
       -8.48, -6.86, -6.95, -5.8 , -5.9 , -4.39])
X=np.arange(0, len(U))
plt.figure()
plt.quiver(X,2,U,V)
plt.ylim([1.5,2.5])
plt.show()

The figure generated from the code is attached. Here, I am looking for the arrows with equal lengths keeping the same wind direction. I also need to reduce the thickness of the arrows. Please help me.

Solution

You can pass constant values for U and V to make all arrows the same length and specify the angles explicitly. The arrow thickness can be adjusted with the width parameter. See the docs for quiver for further details.

plt.quiver(X, 2, np.full_like(X, 1), np.full_like(X, 1), angles=np.rad2deg(np.arctan2(V, U)), width=.002)

Answered By - Stef