| """ | |
| ============== | |
| 3D scatterplot | |
| ============== | |
| Demonstration of a basic scatterplot in 3D. | |
| """ | |
| import matplotlib.pyplot as plt | |
| import numpy as np | |
| # Fixing random state for reproducibility | |
| np.random.seed(19680801) | |
| def randrange(n, vmin, vmax): | |
| """ | |
| Helper function to make an array of random numbers having shape (n, ) | |
| with each number distributed Uniform(vmin, vmax). | |
| """ | |
| return (vmax - vmin)*np.random.rand(n) + vmin | |
| fig = plt.figure() | |
| ax = fig.add_subplot(projection='3d') | |
| n = 100 | |
| # For each set of style and range settings, plot n random points in the box | |
| # defined by x in [23, 32], y in [0, 100], z in [zlow, zhigh]. | |
| for m, zlow, zhigh in [('o', -50, -25), ('^', -30, -5)]: | |
| xs = randrange(n, 23, 32) | |
| ys = randrange(n, 0, 100) | |
| zs = randrange(n, zlow, zhigh) | |
| ax.scatter(xs, ys, zs, marker=m) | |
| ax.set_xlabel('X Label') | |
| ax.set_ylabel('Y Label') | |
| ax.set_zlabel('Z Label') | |
| plt.show() | |