我有这段代码，但无论我怎么尝试，都无法使网格线变实。它们总是被绘制成虚线：import numpy as np;from matplotlib import cm, colors;import cmath;import matpl...

我有这段代码，但无论我怎么尝试，都无法使网格线变得实心。它们总是被绘制成虚线：

import numpy as np;
from matplotlib import cm, colors;
import cmath;
import matplotlib.pyplot as plt;
from mpl_toolkits.mplot3d import Axes3D;
import scipy.special as sp;




l = 3    # degree
m = 0    # order
PHI, THETA = np.mgrid[0:2*np.pi:300j, 0:np.pi:150j]
R = sp.sph_harm(m, l, PHI, THETA).real

s = 1
X = (s*R*0.28+1) * np.sin(THETA) * np.cos(PHI)
Y = (s*R*0.28+1) * np.sin(THETA) * np.sin(PHI)
Z = (s*R*0.29+1) * np.cos(THETA)

norm = colors.Normalize()
fig, ax = plt.subplots(subplot_kw=dict(projection='3d'), figsize=(14,10))
m = cm.ScalarMappable(cmap=cm.jet)
ax.plot_surface(X, Y, Z, rstride=1, cstride=1, facecolors=cm.jet(norm(R)))
m.set_array(R)
fig.colorbar(m, shrink=0.8);