matplotlib & pandas

Python/matplotlab/gallery/frontpage/3D.md

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+# Frontpage 3D示例
+
+此示例再现Frontpage 3D示例。
+
+![Frontpage 3D示例](https://matplotlib.org/_images/sphx_glr_3D_001.png)
+
+```python
+# This import registers the 3D projection, but is otherwise unused.
+from mpl_toolkits.mplot3d import Axes3D  # noqa: F401 unused import
+
+from matplotlib import cbook
+from matplotlib import cm
+from matplotlib.colors import LightSource
+import matplotlib.pyplot as plt
+import numpy as np
+
+filename = cbook.get_sample_data('jacksboro_fault_dem.npz', asfileobj=False)
+with np.load(filename) as dem:
+    z = dem['elevation']
+    nrows, ncols = z.shape
+    x = np.linspace(dem['xmin'], dem['xmax'], ncols)
+    y = np.linspace(dem['ymin'], dem['ymax'], nrows)
+    x, y = np.meshgrid(x, y)
+
+region = np.s_[5:50, 5:50]
+x, y, z = x[region], y[region], z[region]
+
+fig, ax = plt.subplots(subplot_kw=dict(projection='3d'))
+
+ls = LightSource(270, 45)
+# To use a custom hillshading mode, override the built-in shading and pass
+# in the rgb colors of the shaded surface calculated from "shade".
+rgb = ls.shade(z, cmap=cm.gist_earth, vert_exag=0.1, blend_mode='soft')
+surf = ax.plot_surface(x, y, z, rstride=1, cstride=1, facecolors=rgb,
+                       linewidth=0, antialiased=False, shade=False)
+ax.set_xticks([])
+ax.set_yticks([])
+ax.set_zticks([])
+fig.savefig("surface3d_frontpage.png", dpi=25)  # results in 160x120 px image
+```
+
+## 下载这个示例
+            
+- [下载python源码: 3D.py](https://matplotlib.org/_downloads/3D.py)
+- [下载Jupyter notebook: 3D.ipynb](https://matplotlib.org/_downloads/3D.ipynb)