How to apply matplotlib quiver autoscale to two vector fields?-CodePudding

I am plotting two vector fields on top of each other and I want to use the auto-scale feature to set the arrow size such that the two fields are at the same scale automatically. (Part of

If I use

I want to set the auto-scale based on both fields, not just one or the other. Ideas?

CodePudding user response：

You need to pass the same scale argument to both plt.quiver calls.

If you don't provide a scale than a visually pleasing scale is

CodePudding user response：

Normalizing the data before plotting it can help getting similar scales on the arrow sizes:

scale = 1
UV_real = np.real(UV) / np.linalg.norm(UV)
UV_imag = np.imag(UV) / np.linalg.norm(UV)
Q1 = plt.quiver(*XY, *UV_real, scale=scale)
Q2 = plt.quiver(*XY, *UV_imag, scale=scale, color='g')

Tested for multiple magnitude ratios between real and imaginary parts.