为什么pycharm 画3D点状图是空白啊
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
fig = plt.figure()
a = Axes3D(fig)
x = [1, 2, 3, 4]
y = [3, 4, 5, 6]
z = [6, 7, 8, 9]
a.scatter(x, y, z, c='r')
plt.show()
fig = plt.figure()
a = Axes3D(fig)
x = [1, 2, 3, 4]
y = [3, 4, 5, 6]
z = [6, 7, 8, 9]
a.scatter(x, y, z, c='r')
plt.show()