DOC: use notebook-style for plot_ols_3d (#22547)

SamAdamDay · lesteve · pull[bot] · commit 5861480c01c8 · 2024-10-29T11:33:59.000Z
Co-authored-by: Loïc Estève &lt;loic.esteve@ymail.com&gt;
diff --git a/examples/linear_model/plot_ols_3d.py b/examples/linear_model/plot_ols_3d.py
@@ -7,19 +7,18 @@
 Features 1 and 2 of the diabetes-dataset are fitted and
 plotted below. It illustrates that although feature 2
 has a strong coefficient on the full model, it does not
-give us much regarding `y` when compared to just feature 1
-
+give us much regarding `y` when compared to just feature 1.
 """
 
 # Code source: Gaël Varoquaux
 # Modified for documentation by Jaques Grobler
 # License: BSD 3 clause
 
-import matplotlib.pyplot as plt
-import numpy as np
-from mpl_toolkits.mplot3d import Axes3D
+# %%
+# First we load the diabetes dataset.
 
-from sklearn import datasets, linear_model
+from sklearn import datasets
+import numpy as np
 
 X, y = datasets.load_diabetes(return_X_y=True)
 indices = (0, 1)
@@ -29,16 +28,25 @@
 y_train = y[:-20]
 y_test = y[-20:]
 
+# %%
+# Next we fit a linear regression model.
+
+from sklearn import linear_model
+
 ols = linear_model.LinearRegression()
-ols.fit(X_train, y_train)
+_ = ols.fit(X_train, y_train)
+
+
+# %%
+# Finally we plot the figure from three different views.
+
+import matplotlib.pyplot as plt
 
 
-# #############################################################################
-# Plot the figure
 def plot_figs(fig_num, elev, azim, X_train, clf):
     fig = plt.figure(fig_num, figsize=(4, 3))
     plt.clf()
-    ax = Axes3D(fig, elev=elev, azim=azim)
+    ax = fig.add_subplot(111, projection="3d", elev=elev, azim=azim)
 
     ax.scatter(X_train[:, 0], X_train[:, 1], y_train, c="k", marker="+")
     ax.plot_surface(
