在不同的平面中创建二维条形图

演示制作3D绘图，其中2D条形图投影到平面y = 0，y = 1等。

在不同的平面中创建二维条形图示例

  1. # This import registers the 3D projection, but is otherwise unused.
  2. from mpl_toolkits.mplot3d import Axes3D  # noqa: F401 unused import
  4. import matplotlib.pyplot as plt
  5. import numpy as np
  7. # Fixing random state for reproducibility
  8. np.random.seed(19680801)
  11. fig = plt.figure()
  12. ax = fig.add_subplot(111, projection='3d')
  14. colors = ['r', 'g', 'b', 'y']
  15. yticks = [3, 2, 1, 0]
  16. for c, k in zip(colors, yticks):
  17.     # Generate the random data for the y=k 'layer'.
  18.     xs = np.arange(20)
  19.     ys = np.random.rand(20)
  21.     # You can provide either a single color or an array with the same length as
  22.     # xs and ys. To demonstrate this, we color the first bar of each set cyan.
  23.     cs = [c] * len(xs)
  24.     cs[0] = 'c'
  26.     # Plot the bar graph given by xs and ys on the plane y=k with 80% opacity.
  27.     ax.bar(xs, ys, zs=k, zdir='y', color=cs, alpha=0.8)
  29. ax.set_xlabel('X')
  30. ax.set_ylabel('Y')
  31. ax.set_zlabel('Z')
  33. # On the y axis let's only label the discrete values that we have data for.
  34. ax.set_yticks(yticks)
  36. plt.show()

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