Hi, perhaps I am misinterpreting the docs. When I run the following code, I expect the bottom-right arrow (element [2,0]) to point to the left. However, it’s the top-left as (see figure). Quiver seems to be transposing the U,V matrices. Am I missing anything?
import numpy as np import matplotlib.pyplot as plt x = np.linspace(0.3,.9,3) y = x nb_points = x.size X,Y = np.meshgrid(x,y) U = np.ones((nb_points, nb_points)) V = np.ones((nb_points, nb_points)) U[2,0] = -3 M = (np.hypot(U, V)) fig,ax = plt.subplots(1,1, figsize=(4,4)) ax.quiver(X, Y, U, V, M, units='width', pivot='middle') ax.set_xlim(.2,1) ax.set_ylim(.2,1)