python - Matplotlib ConnectionPatch 线被其他轴挡住了

Question

当我试图画一个箭头时，指向端被其他轴挡住了，你知道如何使那个部分可见吗？

如果您可以在我这里的示例代码之上进行编辑，那就太好了。

from matplotlib.patches import ConnectionPatch
import matplotlib.pyplot as plt
import numpy as np

grid_data = np.array([[[-0.1779874 , -0.90335705, -0.31157705,  0.77770067],
        [ 0.93698288,  0.79215241,  0.10155888,  0.96101718],
        [ 0.72994894, -0.83939131,  0.24713443,  0.74839211],
        [ 0.10039462, -0.95778299,  0.43554077,  0.61927077]],

       [[ 0.52294259, -0.0247383 ,  0.23717517, -0.0857769 ],
        [-0.43539246,  0.28503173, -0.39443502, -0.1478289 ],
        [-0.2327904 , -0.08339054,  0.33072907,  0.74634504],
        [-0.524284  , -0.72919194, -0.61543159,  0.17086563]]])
fig, axes = plt.subplots(nrows = 2, ncols = 2, figsize = (2.6, 2.8))
for i in range(2):
    c = axes[0,i].pcolormesh(grid_data[i], cmap = 'RdBu_r', vmin = -1., vmax = 1.)
xyA = (0.5,0)
xyB = (0.5,.5)
coordsA = "axes fraction"
coordsB = "axes fraction"
con = ConnectionPatch(xyA = xyA, xyB = xyB, coordsA=coordsA, coordsB=coordsB,
                      axesA=axes[0,0], axesB=axes[0,1],
                      arrowstyle="->", shrinkB=5, linewidth = 5, edgecolor='b', clip_on=False)
axes[0,0].add_artist(con)
cb_ax = fig.add_axes([0.91, 0.13, 0.01, 0.75])
fig.colorbar(c, cax = cb_ax)
plt.draw()
plt.show()

标签： pythonpython-3.xmatplotlibdata-visualization

Answer 1

感谢@Sam Mason 的指点。解决此问题的一个简单更改是将 zorder 设置为相反的绘图顺序

for i in range(2):
    c = axes[0,i].pcolormesh(grid_data[i], cmap = 'RdBu_r', vmin = -1., vmax = 1.)
    axes[0,i].set_zorder(2-i)