matplotlib & pandas

Python/matplotlab/gallery/axes_grid1/demo_axes_grid.md

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+# 演示Axes Grid
+
+具有单个或自己的彩条的2x2图像的网格。
+
+![演示Axes Grid](https://matplotlib.org/_images/sphx_glr_demo_axes_grid_0011.png)
+
+```python
+import matplotlib.pyplot as plt
+from mpl_toolkits.axes_grid1 import ImageGrid
+
+
+def get_demo_image():
+    import numpy as np
+    from matplotlib.cbook import get_sample_data
+    f = get_sample_data("axes_grid/bivariate_normal.npy", asfileobj=False)
+    z = np.load(f)
+    # z is a numpy array of 15x15
+    return z, (-3, 4, -4, 3)
+
+
+def demo_simple_grid(fig):
+    """
+    A grid of 2x2 images with 0.05 inch pad between images and only
+    the lower-left axes is labeled.
+    """
+    grid = ImageGrid(fig, 141,  # similar to subplot(141)
+                     nrows_ncols=(2, 2),
+                     axes_pad=0.05,
+                     label_mode="1",
+                     )
+
+    Z, extent = get_demo_image()
+    for i in range(4):
+        im = grid[i].imshow(Z, extent=extent, interpolation="nearest")
+
+    # This only affects axes in first column and second row as share_all =
+    # False.
+    grid.axes_llc.set_xticks([-2, 0, 2])
+    grid.axes_llc.set_yticks([-2, 0, 2])
+
+
+def demo_grid_with_single_cbar(fig):
+    """
+    A grid of 2x2 images with a single colorbar
+    """
+    grid = ImageGrid(fig, 142,  # similar to subplot(142)
+                     nrows_ncols=(2, 2),
+                     axes_pad=0.0,
+                     share_all=True,
+                     label_mode="L",
+                     cbar_location="top",
+                     cbar_mode="single",
+                     )
+
+    Z, extent = get_demo_image()
+    for i in range(4):
+        im = grid[i].imshow(Z, extent=extent, interpolation="nearest")
+    grid.cbar_axes[0].colorbar(im)
+
+    for cax in grid.cbar_axes:
+        cax.toggle_label(False)
+
+    # This affects all axes as share_all = True.
+    grid.axes_llc.set_xticks([-2, 0, 2])
+    grid.axes_llc.set_yticks([-2, 0, 2])
+
+
+def demo_grid_with_each_cbar(fig):
+    """
+    A grid of 2x2 images. Each image has its own colorbar.
+    """
+
+    grid = ImageGrid(fig, 143,  # similar to subplot(143)
+                     nrows_ncols=(2, 2),
+                     axes_pad=0.1,
+                     label_mode="1",
+                     share_all=True,
+                     cbar_location="top",
+                     cbar_mode="each",
+                     cbar_size="7%",
+                     cbar_pad="2%",
+                     )
+    Z, extent = get_demo_image()
+    for i in range(4):
+        im = grid[i].imshow(Z, extent=extent, interpolation="nearest")
+        grid.cbar_axes[i].colorbar(im)
+
+    for cax in grid.cbar_axes:
+        cax.toggle_label(False)
+
+    # This affects all axes because we set share_all = True.
+    grid.axes_llc.set_xticks([-2, 0, 2])
+    grid.axes_llc.set_yticks([-2, 0, 2])
+
+
+def demo_grid_with_each_cbar_labelled(fig):
+    """
+    A grid of 2x2 images. Each image has its own colorbar.
+    """
+
+    grid = ImageGrid(fig, 144,  # similar to subplot(144)
+                     nrows_ncols=(2, 2),
+                     axes_pad=(0.45, 0.15),
+                     label_mode="1",
+                     share_all=True,
+                     cbar_location="right",
+                     cbar_mode="each",
+                     cbar_size="7%",
+                     cbar_pad="2%",
+                     )
+    Z, extent = get_demo_image()
+
+    # Use a different colorbar range every time
+    limits = ((0, 1), (-2, 2), (-1.7, 1.4), (-1.5, 1))
+    for i in range(4):
+        im = grid[i].imshow(Z, extent=extent, interpolation="nearest",
+                            vmin=limits[i][0], vmax=limits[i][1])
+        grid.cbar_axes[i].colorbar(im)
+
+    for i, cax in enumerate(grid.cbar_axes):
+        cax.set_yticks((limits[i][0], limits[i][1]))
+
+    # This affects all axes because we set share_all = True.
+    grid.axes_llc.set_xticks([-2, 0, 2])
+    grid.axes_llc.set_yticks([-2, 0, 2])
+
+
+if 1:
+    F = plt.figure(1, (10.5, 2.5))
+
+    F.subplots_adjust(left=0.05, right=0.95)
+
+    demo_simple_grid(F)
+    demo_grid_with_single_cbar(F)
+    demo_grid_with_each_cbar(F)
+    demo_grid_with_each_cbar_labelled(F)
+
+    plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: demo_axes_grid.py](https://matplotlib.org/_downloads/demo_axes_grid.py)
+- [下载Jupyter notebook: demo_axes_grid.ipynb](https://matplotlib.org/_downloads/demo_axes_grid.ipynb)