Function _get_nice_quiver_magnitude

xarray/plot/utils.py:975–981

(u, v)

def _get_nice_quiver_magnitude(u, v):
    import matplotlib as mpl

    ticker = mpl.ticker.MaxNLocator(3)
    mean = np.mean(np.hypot(u.to_numpy(), v.to_numpy()))
    magnitude = ticker.tick_values(0, mean)[-2]
    return magnitude


# Copied from matplotlib, tweaked so func can return strings.